18469738 has 16 divisors (see below), whose sum is σ = 32684544. Its totient is φ = 7660080.

The previous prime is 18469687. The next prime is 18469751. The reversal of 18469738 is 83796481.

It is a happy number.

It is a super-2 number, since 2×18469738² = 682262443577288, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20845 + ... + 21712.

It is an arithmetic number, because the mean of its divisors is an integer number (2042784).

Almost surely, 2^18469738 is an apocalyptic number.

18469738 is a deficient number, since it is larger than the sum of its proper divisors (14214806).

18469738 is a wasteful number, since it uses less digits than its factorization.

18469738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42597.

The product of its digits is 290304, while the sum is 46.

The square root of 18469738 is about 4297.6433076746. The cubic root of 18469738 is about 264.3343349832.

The spelling of 18469738 in words is "eighteen million, four hundred sixty-nine thousand, seven hundred thirty-eight".