20680281620 has 24 divisors (see below), whose sum is σ = 43834470624. Its totient is φ = 8194802336.

The previous prime is 20680281581. The next prime is 20680281631. The reversal of 20680281620 is 2618208602.

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, 4829702 + ... + 4833981.

It is an arithmetic number, because the mean of its divisors is an integer number (1826436276).

Almost surely, 2^20680281620 is an apocalyptic number.

20680281620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20680281620 is an abundant number, since it is smaller than the sum of its proper divisors (23154189004).

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

20680281620 is a wasteful number, since it uses less digits than its factorization.

20680281620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9663799 (or 9663797 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 35.

The spelling of 20680281620 in words is "twenty billion, six hundred eighty million, two hundred eighty-one thousand, six hundred twenty".