20515455204 has 24 divisors (see below), whose sum is σ = 47874650208. Its totient is φ = 6837734400.

The previous prime is 20515455203. The next prime is 20515455221. The reversal of 20515455204 is 40255451502.

It is not an unprimeable number, because it can be changed into a prime (20515455203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26179 + ... + 204245.

It is an arithmetic number, because the mean of its divisors is an integer number (1994777092).

Almost surely, 2^20515455204 is an apocalyptic number.

It is an amenable number.

20515455204 is an abundant number, since it is smaller than the sum of its proper divisors (27359195004).

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

20515455204 is a wasteful number, since it uses less digits than its factorization.

20515455204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187675 (or 187673 counting only the distinct ones).

The product of its (nonzero) digits is 40000, while the sum is 33.

The spelling of 20515455204 in words is "twenty billion, five hundred fifteen million, four hundred fifty-five thousand, two hundred four".