20700557700 has 36 divisors (see below), whose sum is σ = 59893614480. Its totient is φ = 5520148640.

The previous prime is 20700557693. The next prime is 20700557711. The reversal of 20700557700 is 775500702.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 34500630 + ... + 34501229.

Almost surely, 2^20700557700 is an apocalyptic number.

20700557700 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20700557700 is an abundant number, since it is smaller than the sum of its proper divisors (39193056780).

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

20700557700 is a wasteful number, since it uses less digits than its factorization.

20700557700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69001876 (or 69001869 counting only the distinct ones).

The product of its (nonzero) digits is 17150, while the sum is 33.

The spelling of 20700557700 in words is "twenty billion, seven hundred million, five hundred fifty-seven thousand, seven hundred".