19987157304 has 48 divisors (see below), whose sum is σ = 54388474920. Its totient is φ = 6630805440.

The previous prime is 19987157299. The next prime is 19987157321. The reversal of 19987157304 is 40375178991.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 642627 + ... + 673010.

Almost surely, 2^19987157304 is an apocalyptic number.

It is an amenable number.

19987157304 is an abundant number, since it is smaller than the sum of its proper divisors (34401317616).

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

19987157304 is a wasteful number, since it uses less digits than its factorization.

19987157304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1315860 (or 1315853 counting only the distinct ones).

The product of its (nonzero) digits is 1905120, while the sum is 54.

The spelling of 19987157304 in words is "nineteen billion, nine hundred eighty-seven million, one hundred fifty-seven thousand, three hundred four".