20311752225 has 12 divisors (see below), whose sum is σ = 33582097136. Its totient is φ = 10832934480.

The previous prime is 20311752169. The next prime is 20311752271. The reversal of 20311752225 is 52225711302.

It is not a de Polignac number, because 20311752225 - 2⁶ = 20311752161 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20311752192 and 20311752201.

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, 135411607 + ... + 135411756.

Almost surely, 2^20311752225 is an apocalyptic number.

20311752225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20311752225 is a deficient number, since it is larger than the sum of its proper divisors (13270344911).

20311752225 is a wasteful number, since it uses less digits than its factorization.

20311752225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 270823376 (or 270823371 counting only the distinct ones).

The product of its (nonzero) digits is 8400, while the sum is 30.

The spelling of 20311752225 in words is "twenty billion, three hundred eleven million, seven hundred fifty-two thousand, two hundred twenty-five".