20764069980 has 24 divisors (see below), whose sum is σ = 58139396112. Its totient is φ = 5537085312.

The previous prime is 20764069967. The next prime is 20764070017. The reversal of 20764069980 is 8996046702.

It is a happy number.

It is a super-2 number, since 2×20764069980² (a number of 21 digits) contains 22 as substring.

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, 173033857 + ... + 173033976.

It is an arithmetic number, because the mean of its divisors is an integer number (2422474838).

Almost surely, 2^20764069980 is an apocalyptic number.

20764069980 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20764069980 is an abundant number, since it is smaller than the sum of its proper divisors (37375326132).

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

20764069980 is a wasteful number, since it uses less digits than its factorization.

20764069980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 346067845 (or 346067843 counting only the distinct ones).

The product of its (nonzero) digits is 1306368, while the sum is 51.

The spelling of 20764069980 in words is "twenty billion, seven hundred sixty-four million, sixty-nine thousand, nine hundred eighty".