18434916 has 36 divisors (see below), whose sum is σ = 47301072. Its totient is φ = 6052464.

The previous prime is 18434879. The next prime is 18434957. The reversal of 18434916 is 61943481.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×18434916² = 679692255854112, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1410 + ... + 6233.

Almost surely, 2^18434916 is an apocalyptic number.

It is an amenable number.

18434916 is an abundant number, since it is smaller than the sum of its proper divisors (28866156).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18434916 is a wasteful number, since it uses less digits than its factorization.

18434916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7720 (or 7715 counting only the distinct ones).

The product of its digits is 20736, while the sum is 36.

The square root of 18434916 is about 4293.5901061932. The cubic root of 18434916 is about 264.1681091826.

The spelling of 18434916 in words is "eighteen million, four hundred thirty-four thousand, nine hundred sixteen".