18406465 has 16 divisors (see below), whose sum is σ = 27538560. Its totient is φ = 11473920.

The previous prime is 18406379. The next prime is 18406471. The reversal of 18406465 is 56460481.

It is not a de Polignac number, because 18406465 - 2⁷ = 18406337 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18406465.

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, 23520 + ... + 24289.

It is an arithmetic number, because the mean of its divisors is an integer number (1721160).

Almost surely, 2^18406465 is an apocalyptic number.

It is an amenable number.

18406465 is a deficient number, since it is larger than the sum of its proper divisors (9132095).

18406465 is a wasteful number, since it uses less digits than its factorization.

18406465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47832.

The product of its (nonzero) digits is 23040, while the sum is 34.

The square root of 18406465 is about 4290.2756321710. The cubic root of 18406465 is about 264.0321404472.

The spelling of 18406465 in words is "eighteen million, four hundred six thousand, four hundred sixty-five".