18696487137 has 24 divisors (see below), whose sum is σ = 27336662496. Its totient is φ = 11326581504.

The previous prime is 18696487111. The next prime is 18696487157. The reversal of 18696487137 is 73178469681.

It is not a de Polignac number, because 18696487137 - 2¹⁰ = 18696486113 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18696487157) 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, 175063 + ... + 260844.

It is an arithmetic number, because the mean of its divisors is an integer number (1139027604).

Almost surely, 2^18696487137 is an apocalyptic number.

18696487137 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

18696487137 is a deficient number, since it is larger than the sum of its proper divisors (8640175359).

18696487137 is a wasteful number, since it uses less digits than its factorization.

18696487137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 435985 (or 435956 counting only the distinct ones).

The product of its digits is 12192768, while the sum is 60.

The spelling of 18696487137 in words is "eighteen billion, six hundred ninety-six million, four hundred eighty-seven thousand, one hundred thirty-seven".