20702772080 has 40 divisors (see below), whose sum is σ = 48630189552. Its totient is φ = 8195733504.

The previous prime is 20702772043. The next prime is 20702772109. The reversal of 20702772080 is 8027720702.

It is a tau number, because it is divible by the number of its divisors (40).

It is a self number, because there is not a number n which added to its sum of digits gives 20702772080.

It is a congruent number.

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, 1326182 + ... + 1341701.

Almost surely, 2^20702772080 is an apocalyptic number.

20702772080 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20702772080 is an abundant number, since it is smaller than the sum of its proper divisors (27927417472).

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

20702772080 is a wasteful number, since it uses less digits than its factorization.

20702772080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2667993 (or 2667987 counting only the distinct ones).

The product of its (nonzero) digits is 21952, while the sum is 35.

The spelling of 20702772080 in words is "twenty billion, seven hundred two million, seven hundred seventy-two thousand, eighty".