20808202680 has 96 divisors (see below), whose sum is σ = 67655774160. Its totient is φ = 5546465280.

The previous prime is 20808202673. The next prime is 20808202693. The reversal of 20808202680 is 8620280802.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 922335 + ... + 944625.

Almost surely, 2^20808202680 is an apocalyptic number.

20808202680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20808202680 is an abundant number, since it is smaller than the sum of its proper divisors (46847571480).

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

20808202680 is a wasteful number, since it uses less digits than its factorization.

20808202680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24901 (or 24894 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 36.

The spelling of 20808202680 in words is "twenty billion, eight hundred eight million, two hundred two thousand, six hundred eighty".