20397370968 has 512 divisors, whose sum is σ = 66624768000. Its totient is φ = 5732812800.

The previous prime is 20397370957. The next prime is 20397371053. The reversal of 20397370968 is 86907379302.

20397370968 is a `hidden beast` number, since 203 + 9 + 7 + 370 + 9 + 68 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 201954118 + ... + 201954218.

It is an arithmetic number, because the mean of its divisors is an integer number (130126500).

Almost surely, 2^20397370968 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 20397370968, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33312384000).

20397370968 is an abundant number, since it is smaller than the sum of its proper divisors (46227397032).

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

20397370968 is a wasteful number, since it uses less digits than its factorization.

20397370968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 264 (or 254 counting only the distinct ones).

The product of its (nonzero) digits is 3429216, while the sum is 54.

The spelling of 20397370968 in words is "twenty billion, three hundred ninety-seven million, three hundred seventy thousand, nine hundred sixty-eight".