20555038735554 has 16 divisors (see below), whose sum is σ = 41110599768192. Its totient is φ = 6851592529008.

The previous prime is 20555038735531. The next prime is 20555038735603. The reversal of 20555038735554 is 45553783055502.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 20555038735494 and 20555038735503.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21249834 + ... + 22196069.

It is an arithmetic number, because the mean of its divisors is an integer number (2569412485512).

Almost surely, 2^{20555038735554} is an apocalyptic number.

20555038735554 is an abundant number, since it is smaller than the sum of its proper divisors (20555561032638).

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

20555038735554 is a wasteful number, since it uses less digits than its factorization.

20555038735554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43524761.

The product of its (nonzero) digits is 63000000, while the sum is 57.

The spelling of 20555038735554 in words is "twenty trillion, five hundred fifty-five billion, thirty-eight million, seven hundred thirty-five thousand, five hundred fifty-four".