20993935080 has 32 divisors (see below), whose sum is σ = 62981805600. Its totient is φ = 5598382656.

The previous prime is 20993935049. The next prime is 20993935093. The reversal of 20993935080 is 8053939902.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 87474610 + ... + 87474849.

It is an arithmetic number, because the mean of its divisors is an integer number (1968181425).

Almost surely, 2^20993935080 is an apocalyptic number.

20993935080 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20993935080 is an abundant number, since it is smaller than the sum of its proper divisors (41987870520).

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

20993935080 is a wasteful number, since it uses less digits than its factorization.

20993935080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174949473 (or 174949469 counting only the distinct ones).

The product of its (nonzero) digits is 524880, while the sum is 48.

The spelling of 20993935080 in words is "twenty billion, nine hundred ninety-three million, nine hundred thirty-five thousand, eighty".