20422512 has 60 divisors (see below), whose sum is σ = 62355384. Its totient is φ = 6188160.

The previous prime is 20422499. The next prime is 20422513. The reversal of 20422512 is 21522402.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20422513) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4863 + ... + 8030.

Almost surely, 2^20422512 is an apocalyptic number.

20422512 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

20422512 is an abundant number, since it is smaller than the sum of its proper divisors (41932872).

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

20422512 is a wasteful number, since it uses less digits than its factorization.

20422512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12918 (or 12909 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 20422512 is about 4519.1273493895. The cubic root of 20422512 is about 273.3399139139.

Adding to 20422512 its reverse (21522402), we get a palindrome (41944914).

It can be divided in two parts, 2042 and 2512, that added together give a palindrome (4554).

The spelling of 20422512 in words is "twenty million, four hundred twenty-two thousand, five hundred twelve".