20312553708 has 144 divisors (see below), whose sum is σ = 55183564800. Its totient is φ = 6526396800.

The previous prime is 20312553691. The next prime is 20312553721. The reversal of 20312553708 is 80735521302.

It is a happy number.

20312553708 is a `hidden beast` number, since 2 + 0 + 31 + 2 + 553 + 70 + 8 = 666.

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 47 ways as a sum of consecutive naturals, for example, 8465893 + ... + 8468291.

It is an arithmetic number, because the mean of its divisors is an integer number (383219200).

Almost surely, 2^20312553708 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20312553708, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27591782400).

20312553708 is an abundant number, since it is smaller than the sum of its proper divisors (34871011092).

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

20312553708 is a wasteful number, since it uses less digits than its factorization.

20312553708 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2730 (or 2716 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 36.

The spelling of 20312553708 in words is "twenty billion, three hundred twelve million, five hundred fifty-three thousand, seven hundred eight".