19877495120 has 160 divisors (see below), whose sum is σ = 55292461056. Its totient is φ = 6502003200.

The previous prime is 19877495083. The next prime is 19877495167. The reversal of 19877495120 is 2159477891.

It is a super-2 number, since 2×19877495120² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1224497 + ... + 1240623.

Almost surely, 2^19877495120 is an apocalyptic number.

19877495120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19877495120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27646230528).

19877495120 is an abundant number, since it is smaller than the sum of its proper divisors (35414965936).

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

19877495120 is a wasteful number, since it uses less digits than its factorization.

19877495120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16249 (or 16243 counting only the distinct ones).

The product of its (nonzero) digits is 1270080, while the sum is 53.

The spelling of 19877495120 in words is "nineteen billion, eight hundred seventy-seven million, four hundred ninety-five thousand, one hundred twenty".