19987241373 has 24 divisors (see below), whose sum is σ = 32547334400. Its totient is φ = 12113477640.

The previous prime is 19987241359. The next prime is 19987241389. The reversal of 19987241373 is 37314278991.

19987241373 is a `hidden beast` number, since 1 + 9 + 98 + 72 + 413 + 73 = 666.

It is not a de Polignac number, because 19987241373 - 2²⁹ = 19450370461 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19987241473) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3055693 + ... + 3062226.

Almost surely, 2^19987241373 is an apocalyptic number.

It is an amenable number.

19987241373 is a deficient number, since it is larger than the sum of its proper divisors (12560093027).

19987241373 is a wasteful number, since it uses less digits than its factorization.

19987241373 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6117950 (or 6117933 counting only the distinct ones).

The product of its digits is 2286144, while the sum is 54.

The spelling of 19987241373 in words is "nineteen billion, nine hundred eighty-seven million, two hundred forty-one thousand, three hundred seventy-three".