19975487120 has 80 divisors (see below), whose sum is σ = 48491896320. Its totient is φ = 7638124032.

The previous prime is 19975487047. The next prime is 19975487149. The reversal of 19975487120 is 2178457991.

It is a tau number, because it is divible by the number of its divisors (80).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5383826 + ... + 5387534.

It is an arithmetic number, because the mean of its divisors is an integer number (606148704).

Almost surely, 2^19975487120 is an apocalyptic number.

19975487120 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 19975487120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24245948160).

19975487120 is an abundant number, since it is smaller than the sum of its proper divisors (28516409200).

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

19975487120 is a wasteful number, since it uses less digits than its factorization.

19975487120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6672 (or 6666 counting only the distinct ones).

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

The spelling of 19975487120 in words is "nineteen billion, nine hundred seventy-five million, four hundred eighty-seven thousand, one hundred twenty".