20620080 has 120 divisors (see below), whose sum is σ = 74609808. Its totient is φ = 5073408.

The previous prime is 20620079. The next prime is 20620081. The reversal of 20620080 is 8002602.

It is an interprime number because it is at equal distance from previous prime (20620079) and next prime (20620081).

It is a tau number, because it is divible by the number of its divisors (120).

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

It is not an unprimeable number, because it can be changed into a prime (20620081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8259 + ... + 10461.

Almost surely, 2^20620080 is an apocalyptic number.

20620080 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 20620080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37304904).

20620080 is an abundant number, since it is smaller than the sum of its proper divisors (53989728).

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

20620080 is a wasteful number, since it uses less digits than its factorization.

20620080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2235 (or 2226 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 20620080 is about 4540.9338246665. The cubic root of 20620080 is about 274.2185196263.

Adding to 20620080 its reverse (8002602), we get a palindrome (28622682).

The spelling of 20620080 in words is "twenty million, six hundred twenty thousand, eighty".