20700139208 has 16 divisors (see below), whose sum is σ = 44357441280. Its totient is φ = 8871488208.

The previous prime is 20700139189. The next prime is 20700139231. The reversal of 20700139208 is 80293100702.

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, 184822616 + ... + 184822727.

It is an arithmetic number, because the mean of its divisors is an integer number (2772340080).

Almost surely, 2^20700139208 is an apocalyptic number.

20700139208 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

20700139208 is an abundant number, since it is smaller than the sum of its proper divisors (23657302072).

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

20700139208 is a wasteful number, since it uses less digits than its factorization.

20700139208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 369645356 (or 369645352 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 32.

The spelling of 20700139208 in words is "twenty billion, seven hundred million, one hundred thirty-nine thousand, two hundred eight".