20426512 has 10 divisors (see below), whose sum is σ = 39576398. Its totient is φ = 10213248.

The previous prime is 20426509. The next prime is 20426513. The reversal of 20426512 is 21562402.

It can be written as a sum of positive squares in only one way, i.e., 17272336 + 3154176 = 4156^2 + 1776^2 .

It is a super-2 number, since 2×20426512² = 834484784972288, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20426513) 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 as a sum of consecutive naturals, namely, 638313 + ... + 638344.

Almost surely, 2^20426512 is an apocalyptic number.

It is an amenable number.

20426512 is a deficient number, since it is larger than the sum of its proper divisors (19149886).

20426512 is a wasteful number, since it uses less digits than its factorization.

20426512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1276665 (or 1276659 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 20426512 is about 4519.5698910405. The cubic root of 20426512 is about 273.3577584095.

Adding to 20426512 its reverse (21562402), we get a palindrome (41988914).

The spelling of 20426512 in words is "twenty million, four hundred twenty-six thousand, five hundred twelve".