13004191988 has 6 divisors (see below), whose sum is σ = 22757335986. Its totient is φ = 6502095992.

The previous prime is 13004191979. The next prime is 13004191999. The reversal of 13004191988 is 88919140031.

It can be written as a sum of positive squares in only one way, i.e., 12793419664 + 210772324 = 113108^2 + 14518^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1625523995 + ... + 1625524002.

It is an arithmetic number, because the mean of its divisors is an integer number (3792889331).

Almost surely, 2^13004191988 is an apocalyptic number.

It is an amenable number.

13004191988 is a deficient number, since it is larger than the sum of its proper divisors (9753143998).

13004191988 is a wasteful number, since it uses less digits than its factorization.

13004191988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3251048001 (or 3251047999 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 44.

The spelling of 13004191988 in words is "thirteen billion, four million, one hundred ninety-one thousand, nine hundred eighty-eight".