20630612664 has 48 divisors (see below), whose sum is σ = 56708538120. Its totient is φ = 6774229440.

The previous prime is 20630612647. The next prime is 20630612669. The reversal of 20630612664 is 46621603602.

20630612664 is a `hidden beast` number, since 2 + 0 + 6 + 30 + 612 + 6 + 6 + 4 = 666.

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 (20630612669) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2133507 + ... + 2143154.

Almost surely, 2^20630612664 is an apocalyptic number.

20630612664 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20630612664 is an abundant number, since it is smaller than the sum of its proper divisors (36077925456).

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

20630612664 is a wasteful number, since it uses less digits than its factorization.

20630612664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4276740 (or 4276733 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 36.

The spelling of 20630612664 in words is "twenty billion, six hundred thirty million, six hundred twelve thousand, six hundred sixty-four".