20431544768145 has 48 divisors (see below), whose sum is σ = 41779527508992. Its totient is φ = 9038840077440.

The previous prime is 20431544768113. The next prime is 20431544768153. The reversal of 20431544768145 is 54186744513402.

20431544768145 is a `hidden beast` number, since 2 + 0 + 4 + 3 + 1 + 54 + 476 + 81 + 45 = 666.

It is not a de Polignac number, because 20431544768145 - 2⁵ = 20431544768113 is a prime.

It is a super-2 number, since 2×20431544768145² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20431544768091 and 20431544768100.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1046152282 + ... + 1046171811.

It is an arithmetic number, because the mean of its divisors is an integer number (870406823104).

Almost surely, 2^{20431544768145} is an apocalyptic number.

It is an amenable number.

20431544768145 is an abundant number, since it is smaller than the sum of its proper divisors (21347982740847).

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

20431544768145 is a wasteful number, since it uses less digits than its factorization.

20431544768145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2092324142 (or 2092324139 counting only the distinct ones).

The product of its (nonzero) digits is 12902400, while the sum is 54.

The spelling of 20431544768145 in words is "twenty trillion, four hundred thirty-one billion, five hundred forty-four million, seven hundred sixty-eight thousand, one hundred forty-five".