18996477374 has 32 divisors (see below), whose sum is σ = 33190871040. Its totient is φ = 7986420288.

The previous prime is 18996477361. The next prime is 18996477389. The reversal of 18996477374 is 47377469981.

It is a self number, because there is not a number n which added to its sum of digits gives 18996477374.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 98219 + ... + 218265.

It is an arithmetic number, because the mean of its divisors is an integer number (1037214720).

Almost surely, 2^18996477374 is an apocalyptic number.

18996477374 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

18996477374 is a deficient number, since it is larger than the sum of its proper divisors (14194393666).

18996477374 is a wasteful number, since it uses less digits than its factorization.

18996477374 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120272.

The product of its digits is 64012032, while the sum is 65.

The spelling of 18996477374 in words is "eighteen billion, nine hundred ninety-six million, four hundred seventy-seven thousand, three hundred seventy-four".