20590216788 has 12 divisors (see below), whose sum is σ = 48043839200. Its totient is φ = 6863405592.

The previous prime is 20590216781. The next prime is 20590216789. The reversal of 20590216788 is 88761209502.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20590216781) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 857925688 + ... + 857925711.

Almost surely, 2^20590216788 is an apocalyptic number.

It is an amenable number.

20590216788 is an abundant number, since it is smaller than the sum of its proper divisors (27453622412).

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

20590216788 is a wasteful number, since it uses less digits than its factorization.

20590216788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1715851406 (or 1715851404 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 48.

The spelling of 20590216788 in words is "twenty billion, five hundred ninety million, two hundred sixteen thousand, seven hundred eighty-eight".