18456490 has 48 divisors (see below), whose sum is σ = 36734688. Its totient is φ = 6671808.

The previous prime is 18456469. The next prime is 18456497. The reversal of 18456490 is 9465481.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (18456497) 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, 113149 + ... + 113311.

It is an arithmetic number, because the mean of its divisors is an integer number (765306).

Almost surely, 2^18456490 is an apocalyptic number.

18456490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18456490 is a deficient number, since it is larger than the sum of its proper divisors (18278198).

18456490 is a wasteful number, since it uses less digits than its factorization.

18456490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 263 (or 250 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 37.

The square root of 18456490 is about 4296.1017213283. The cubic root of 18456490 is about 264.2711191634.

The spelling of 18456490 in words is "eighteen million, four hundred fifty-six thousand, four hundred ninety".