18319674490 has 32 divisors (see below), whose sum is σ = 35565875856. Its totient is φ = 6753922560.

The previous prime is 18319674479. The next prime is 18319674511. The reversal of 18319674490 is 9447691381.

It can be written as a sum of positive squares in 8 ways, for example, as 7751217681 + 10568456809 = 88041^2 + 102803^2 .

It is a super-3 number, since 3×18319674490³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

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, 20667 + ... + 192526.

Almost surely, 2^18319674490 is an apocalyptic number.

18319674490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18319674490 is a deficient number, since it is larger than the sum of its proper divisors (17246201366).

18319674490 is a wasteful number, since it uses less digits than its factorization.

18319674490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213874.

The product of its (nonzero) digits is 1306368, while the sum is 52.

The spelling of 18319674490 in words is "eighteen billion, three hundred nineteen million, six hundred seventy-four thousand, four hundred ninety".