20315225312 has 24 divisors (see below), whose sum is σ = 40014895536. Its totient is φ = 10152712192.

The previous prime is 20315225311. The next prime is 20315225321. The reversal of 20315225312 is 21352251302.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20315225311) 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, 85313 + ... + 218880.

It is an arithmetic number, because the mean of its divisors is an integer number (1667287314).

Almost surely, 2^20315225312 is an apocalyptic number.

It is an amenable number.

20315225312 is a deficient number, since it is larger than the sum of its proper divisors (19699670224).

20315225312 is a wasteful number, since it uses less digits than its factorization.

20315225312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 306290 (or 306282 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 26.

Adding to 20315225312 its reverse (21352251302), we get a palindrome (41667476614).

The spelling of 20315225312 in words is "twenty billion, three hundred fifteen million, two hundred twenty-five thousand, three hundred twelve".