20215495552 has 64 divisors (see below), whose sum is σ = 46049034240. Its totient is φ = 8659514880.

The previous prime is 20215495453. The next prime is 20215495567. The reversal of 20215495552 is 25559451202.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

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, 2388993 + ... + 2397439.

It is an arithmetic number, because the mean of its divisors is an integer number (719516160).

Almost surely, 2^20215495552 is an apocalyptic number.

It is an amenable number.

20215495552 is an abundant number, since it is smaller than the sum of its proper divisors (25833538688).

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

20215495552 is an equidigital number, since it uses as much as digits as its factorization.

20215495552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11139 (or 11127 counting only the distinct ones).

The product of its (nonzero) digits is 180000, while the sum is 40.

The spelling of 20215495552 in words is "twenty billion, two hundred fifteen million, four hundred ninety-five thousand, five hundred fifty-two".