20515522535454 has 64 divisors (see below), whose sum is σ = 43499120670720. Its totient is φ = 6428174231040.

The previous prime is 20515522535407. The next prime is 20515522535477. The reversal of 20515522535454 is 45453522551502.

It is a super-2 number, since 2×20515522535454² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 389018872 + ... + 389071604.

It is an arithmetic number, because the mean of its divisors is an integer number (679673760480).

Almost surely, 2^{20515522535454} is an apocalyptic number.

20515522535454 is an abundant number, since it is smaller than the sum of its proper divisors (22983598135266).

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

20515522535454 is a wasteful number, since it uses less digits than its factorization.

20515522535454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57465.

The product of its (nonzero) digits is 6000000, while the sum is 48.

The spelling of 20515522535454 in words is "twenty trillion, five hundred fifteen billion, five hundred twenty-two million, five hundred thirty-five thousand, four hundred fifty-four".