20487176980 has 24 divisors (see below), whose sum is σ = 43612431912. Its totient is φ = 8082611712.

The previous prime is 20487176959. The next prime is 20487176989. The reversal of 20487176980 is 8967178402.

It can be written as a sum of positive squares in 4 ways, for example, as 4727387536 + 15759789444 = 68756^2 + 125538^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20487176989) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7014697 + ... + 7017616.

It is an arithmetic number, because the mean of its divisors is an integer number (1817184663).

Almost surely, 2^20487176980 is an apocalyptic number.

20487176980 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20487176980 is an abundant number, since it is smaller than the sum of its proper divisors (23125254932).

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

20487176980 is a wasteful number, since it uses less digits than its factorization.

20487176980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14032395 (or 14032393 counting only the distinct ones).

The product of its (nonzero) digits is 1354752, while the sum is 52.

The spelling of 20487176980 in words is "twenty billion, four hundred eighty-seven million, one hundred seventy-six thousand, nine hundred eighty".