20311164225 has 36 divisors (see below), whose sum is σ = 39686788752. Its totient is φ = 9847836000.

The previous prime is 20311164221. The next prime is 20311164253. The reversal of 20311164225 is 52246111302.

20311164225 is a `hidden beast` number, since 2 + 0 + 3 + 1 + 11 + 642 + 2 + 5 = 666.

It is not a de Polignac number, because 20311164225 - 2² = 20311164221 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20311164221) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 4100791 + ... + 4105740.

Almost surely, 2^20311164225 is an apocalyptic number.

20311164225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20311164225 is a deficient number, since it is larger than the sum of its proper divisors (19375624527).

20311164225 is a wasteful number, since it uses less digits than its factorization.

20311164225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8206558 (or 8206550 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

Adding to 20311164225 its reverse (52246111302), we get a palindrome (72557275527).

The spelling of 20311164225 in words is "twenty billion, three hundred eleven million, one hundred sixty-four thousand, two hundred twenty-five".