20689597368 has 384 divisors, whose sum is σ = 66352104000. Its totient is φ = 6035420160.

The previous prime is 20689597337. The next prime is 20689597403. The reversal of 20689597368 is 86379598602.

20689597368 is a `hidden beast` number, since 2 + 0 + 6 + 8 + 9 + 597 + 36 + 8 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 61393296 + ... + 61393632.

Almost surely, 2^20689597368 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 20689597368, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33176052000).

20689597368 is an abundant number, since it is smaller than the sum of its proper divisors (45662506632).

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

20689597368 is a wasteful number, since it uses less digits than its factorization.

20689597368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 415 (or 382 counting only the distinct ones).

The product of its (nonzero) digits is 39191040, while the sum is 63.

The spelling of 20689597368 in words is "twenty billion, six hundred eighty-nine million, five hundred ninety-seven thousand, three hundred sixty-eight".