20212778592 has 72 divisors (see below), whose sum is σ = 60861285576. Its totient is φ = 6341262336.

The previous prime is 20212778587. The next prime is 20212778623. The reversal of 20212778592 is 29587721202.

It is a tau number, because it is divible by the number of its divisors (72).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2059318 + ... + 2069109.

It is an arithmetic number, because the mean of its divisors is an integer number (845295633).

Almost surely, 2^20212778592 is an apocalyptic number.

It is an amenable number.

20212778592 is an abundant number, since it is smaller than the sum of its proper divisors (40648506984).

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

20212778592 is a wasteful number, since it uses less digits than its factorization.

20212778592 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4128460 (or 4128449 counting only the distinct ones).

The product of its (nonzero) digits is 282240, while the sum is 45.

The spelling of 20212778592 in words is "twenty billion, two hundred twelve million, seven hundred seventy-eight thousand, five hundred ninety-two".