20205551504 has 40 divisors (see below), whose sum is σ = 40637041920. Its totient is φ = 9722217600.

The previous prime is 20205551491. The next prime is 20205551507. The reversal of 20205551504 is 40515550202.

It is not an unprimeable number, because it can be changed into a prime (20205551507) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25007 + ... + 202574.

It is an arithmetic number, because the mean of its divisors is an integer number (1015926048).

Almost surely, 2^20205551504 is an apocalyptic number.

It is an amenable number.

20205551504 is an abundant number, since it is smaller than the sum of its proper divisors (20431490416).

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

20205551504 is a wasteful number, since it uses less digits than its factorization.

20205551504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227799 (or 227793 counting only the distinct ones).

The product of its (nonzero) digits is 10000, while the sum is 29.

The spelling of 20205551504 in words is "twenty billion, two hundred five million, five hundred fifty-one thousand, five hundred four".