20620215630 has 64 divisors (see below), whose sum is σ = 62842567680. Its totient is φ = 4713191712.

The previous prime is 20620215607. The next prime is 20620215631. The reversal of 20620215630 is 3651202602.

20620215630 is a `hidden beast` number, since 2 + 0 + 6 + 2 + 0 + 21 + 5 + 630 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20620215594 and 20620215603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20620215631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5453194 + ... + 5456973.

It is an arithmetic number, because the mean of its divisors is an integer number (981915120).

Almost surely, 2^20620215630 is an apocalyptic number.

20620215630 is an abundant number, since it is smaller than the sum of its proper divisors (42222352050).

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

20620215630 is a wasteful number, since it uses less digits than its factorization.

20620215630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10910190 (or 10910184 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The spelling of 20620215630 in words is "twenty billion, six hundred twenty million, two hundred fifteen thousand, six hundred thirty".