20426576258929 has 9 divisors (see below), whose sum is σ = 20778928690233. Its totient is φ = 20080100966532.

The previous prime is 20426576258917. The next prime is 20426576258939. The reversal of 20426576258929 is 92985267562402.

The square root of 20426576258929 is 4519577.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 20426576258929 - 2²⁵ = 20426542704497 is a prime.

It is a super-2 number, since 2×20426576258929² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20426576258939) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 266616742 + ... + 266693344.

Almost surely, 2^{20426576258929} is an apocalyptic number.

20426576258929 is the 4519577-th square number.

20426576258929 is the 2259789-th centered octagonal number.

It is an amenable number.

20426576258929 is a deficient number, since it is larger than the sum of its proper divisors (352352431304).

20426576258929 is an frugal number, since it uses more digits than its factorization.

20426576258929 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153324 (or 76662 counting only the distinct ones).

The product of its (nonzero) digits is 261273600, while the sum is 67.

The spelling of 20426576258929 in words is "twenty trillion, four hundred twenty-six billion, five hundred seventy-six million, two hundred fifty-eight thousand, nine hundred twenty-nine".