19137920499 has 6 divisors (see below), whose sum is σ = 27643662956. Its totient is φ = 12758613660.

The previous prime is 19137920491. The next prime is 19137920533. The reversal of 19137920499 is 99402973191.

It is a happy number.

19137920499 is a `hidden beast` number, since 19 + 137 + 9 + 2 + 0 + 499 = 666.

It is not a de Polignac number, because 19137920499 - 2³ = 19137920491 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19137920491) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1063217797 + ... + 1063217814.

Almost surely, 2^19137920499 is an apocalyptic number.

19137920499 is a deficient number, since it is larger than the sum of its proper divisors (8505742457).

19137920499 is a wasteful number, since it uses less digits than its factorization.

19137920499 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2126435617 (or 2126435614 counting only the distinct ones).

The product of its (nonzero) digits is 1102248, while the sum is 54.

The spelling of 19137920499 in words is "nineteen billion, one hundred thirty-seven million, nine hundred twenty thousand, four hundred ninety-nine".