20422080 has 168 divisors, whose sum is σ = 80357472. Its totient is φ = 4663296.

The previous prime is 20422079. The next prime is 20422081. The reversal of 20422080 is 8022402.

It is an interprime number because it is at equal distance from previous prime (20422079) and next prime (20422081).

It is a tau number, because it is divible by the number of its divisors (168).

It is a super-2 number, since 2×20422080² = 834122703052800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a super Niven number, because it is divisible the sum of any subset of its (nonzero) digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20422081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19654 + ... + 20666.

Almost surely, 2^20422080 is an apocalyptic number.

20422080 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20422080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40178736).

20422080 is an abundant number, since it is smaller than the sum of its proper divisors (59935392).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20422080 is a wasteful number, since it uses less digits than its factorization.

20422080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1043 (or 1030 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 20422080 is about 4519.0795522982. The cubic root of 20422080 is about 273.3379865689.

Adding to 20422080 its reverse (8022402), we get a palindrome (28444482).

The spelling of 20422080 in words is "twenty million, four hundred twenty-two thousand, eighty".