20620215788 has 12 divisors (see below), whose sum is σ = 36348775512. Its totient is φ = 10234851360.

The previous prime is 20620215769. The next prime is 20620215809. The reversal of 20620215788 is 88751202602.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18813518 + ... + 18814613.

It is an arithmetic number, because the mean of its divisors is an integer number (3029064626).

Almost surely, 2^20620215788 is an apocalyptic number.

It is an amenable number.

20620215788 is a deficient number, since it is larger than the sum of its proper divisors (15728559724).

20620215788 is a wasteful number, since it uses less digits than its factorization.

20620215788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37628272 (or 37628270 counting only the distinct ones).

The product of its (nonzero) digits is 107520, while the sum is 41.

The spelling of 20620215788 in words is "twenty billion, six hundred twenty million, two hundred fifteen thousand, seven hundred eighty-eight".