20254979072 has 44 divisors (see below), whose sum is σ = 42250669536. Its totient is φ = 9687152640.

The previous prime is 20254979071. The next prime is 20254979077. The reversal of 20254979072 is 27097945202.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20254979071) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 406454 + ... + 453557.

Almost surely, 2^20254979072 is an apocalyptic number.

It is an amenable number.

20254979072 is an abundant number, since it is smaller than the sum of its proper divisors (21995690464).

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

20254979072 is an equidigital number, since it uses as much as digits as its factorization.

20254979072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 860054 (or 860036 counting only the distinct ones).

The product of its (nonzero) digits is 635040, while the sum is 47.

The spelling of 20254979072 in words is "twenty billion, two hundred fifty-four million, nine hundred seventy-nine thousand, seventy-two".