25472138220 has 36 divisors (see below), whose sum is σ = 77265486480. Its totient is φ = 6792570144.

The previous prime is 25472138213. The next prime is 25472138243. The reversal of 25472138220 is 2283127452.

25472138220 is a `hidden beast` number, since 2 + 547 + 2 + 13 + 82 + 20 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

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, 70755760 + ... + 70756119.

Almost surely, 2^25472138220 is an apocalyptic number.

25472138220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25472138220 is an abundant number, since it is smaller than the sum of its proper divisors (51793348260).

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

25472138220 is a wasteful number, since it uses less digits than its factorization.

25472138220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141511894 (or 141511889 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 36.

The spelling of 25472138220 in words is "twenty-five billion, four hundred seventy-two million, one hundred thirty-eight thousand, two hundred twenty".