20630213568 has 56 divisors (see below), whose sum is σ = 60649012560. Its totient is φ = 6876737280.

The previous prime is 20630213567. The next prime is 20630213573. The reversal of 20630213568 is 86531203602.

It is a happy number.

20630213568 is a `hidden beast` number, since 2 + 0 + 630 + 2 + 13 + 5 + 6 + 8 = 666.

It is a super-2 number, since 2×20630213568² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20630213563) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5967663 + ... + 5971118.

Almost surely, 2^20630213568 is an apocalyptic number.

It is an amenable number.

20630213568 is an abundant number, since it is smaller than the sum of its proper divisors (40018798992).

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

20630213568 is a wasteful number, since it uses less digits than its factorization.

20630213568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11938802 (or 11938786 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The spelling of 20630213568 in words is "twenty billion, six hundred thirty million, two hundred thirteen thousand, five hundred sixty-eight".