18455913 has 48 divisors (see below), whose sum is σ = 32587776. Its totient is φ = 9836640.

The previous prime is 18455911. The next prime is 18455923. The reversal of 18455913 is 31955481.

It is not a de Polignac number, because 18455913 - 2¹ = 18455911 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (18455911) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 67968 + ... + 68238.

It is an arithmetic number, because the mean of its divisors is an integer number (678912).

Almost surely, 2^18455913 is an apocalyptic number.

It is an amenable number.

18455913 is a deficient number, since it is larger than the sum of its proper divisors (14131863).

18455913 is a wasteful number, since it uses less digits than its factorization.

18455913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 354 (or 351 counting only the distinct ones).

The product of its digits is 21600, while the sum is 36.

The square root of 18455913 is about 4296.0345669000. The cubic root of 18455913 is about 264.2683651904.

The spelling of 18455913 in words is "eighteen million, four hundred fifty-five thousand, nine hundred thirteen".