20426604040 has 16 divisors (see below), whose sum is σ = 45959859180. Its totient is φ = 8170641600.

The previous prime is 20426604001. The next prime is 20426604067. The reversal of 20426604040 is 4040662402.

It can be written as a sum of positive squares in 2 ways, for example, as 19177264324 + 1249339716 = 138482^2 + 35346^2 .

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 255332511 + ... + 255332590.

Almost surely, 2^20426604040 is an apocalyptic number.

20426604040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20426604040 is an abundant number, since it is smaller than the sum of its proper divisors (25533255140).

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

20426604040 is a wasteful number, since it uses less digits than its factorization.

20426604040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 510665112 (or 510665108 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 28.

The spelling of 20426604040 in words is "twenty billion, four hundred twenty-six million, six hundred four thousand, forty".