19880505020 has 24 divisors (see below), whose sum is σ = 42179467344. Its totient is φ = 7870219776.

The previous prime is 19880505019. The next prime is 19880505079. The reversal of 19880505020 is 2050508891.

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, 5121902 + ... + 5125781.

It is an arithmetic number, because the mean of its divisors is an integer number (1757477806).

Almost surely, 2^19880505020 is an apocalyptic number.

19880505020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19880505020 is an abundant number, since it is smaller than the sum of its proper divisors (22298962324).

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

19880505020 is a wasteful number, since it uses less digits than its factorization.

19880505020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10247789 (or 10247787 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 38.

The spelling of 19880505020 in words is "nineteen billion, eight hundred eighty million, five hundred five thousand, twenty".