20081658808 has 8 divisors (see below), whose sum is σ = 37653110280. Its totient is φ = 10040829400.

The previous prime is 20081658791. The next prime is 20081658811. The reversal of 20081658808 is 80885618002.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1255103668 + ... + 1255103683.

It is an arithmetic number, because the mean of its divisors is an integer number (4706638785).

Almost surely, 2^20081658808 is an apocalyptic number.

It is an amenable number.

20081658808 is a deficient number, since it is larger than the sum of its proper divisors (17571451472).

20081658808 is a wasteful number, since it uses less digits than its factorization.

20081658808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2510207357 (or 2510207353 counting only the distinct ones).

The product of its (nonzero) digits is 245760, while the sum is 46.

The spelling of 20081658808 in words is "twenty billion, eighty-one million, six hundred fifty-eight thousand, eight hundred eight".