13187471920 has 320 divisors, whose sum is σ = 37997568000. Its totient is φ = 4247147520.

The previous prime is 13187471909. The next prime is 13187471933. The reversal of 13187471920 is 2917478131.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 31473471 + ... + 31473889.

It is an arithmetic number, because the mean of its divisors is an integer number (118742400).

Almost surely, 2^13187471920 is an apocalyptic number.

13187471920 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 13187471920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18998784000).

13187471920 is an abundant number, since it is smaller than the sum of its proper divisors (24810096080).

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

13187471920 is a wasteful number, since it uses less digits than its factorization.

13187471920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 521 (or 501 counting only the distinct ones).

The product of its (nonzero) digits is 84672, while the sum is 43.

The spelling of 13187471920 in words is "thirteen billion, one hundred eighty-seven million, four hundred seventy-one thousand, nine hundred twenty".