20056197312 has 84 divisors (see below), whose sum is σ = 57533612136. Its totient is φ = 6680033280.

The previous prime is 20056197283. The next prime is 20056197323. The reversal of 20056197312 is 21379165002.

20056197312 is a `hidden beast` number, since 2 + 0 + 0 + 5 + 619 + 7 + 31 + 2 = 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 11 ways as a sum of consecutive naturals, for example, 739512 + ... + 766152.

It is an arithmetic number, because the mean of its divisors is an integer number (684923954).

Almost surely, 2^20056197312 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 20056197312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28766806068).

20056197312 is an abundant number, since it is smaller than the sum of its proper divisors (37477414824).

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

20056197312 is a wasteful number, since it uses less digits than its factorization.

20056197312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27966 (or 27953 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 36.

The spelling of 20056197312 in words is "twenty billion, fifty-six million, one hundred ninety-seven thousand, three hundred twelve".