20570039808 has 80 divisors (see below), whose sum is σ = 56136625776. Its totient is φ = 6689423360.

The previous prime is 20570039807. The next prime is 20570039843. The reversal of 20570039808 is 80893007502.

It is a self number, because there is not a number n which added to its sum of digits gives 20570039808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20570039807) 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, 100341 + ... + 226292.

Almost surely, 2^20570039808 is an apocalyptic number.

It is an amenable number.

20570039808 is an abundant number, since it is smaller than the sum of its proper divisors (35566585968).

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

20570039808 is an equidigital number, since it uses as much as digits as its factorization.

20570039808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 326695 (or 326679 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 42.

The spelling of 20570039808 in words is "twenty billion, five hundred seventy million, thirty-nine thousand, eight hundred eight".