18113953 has 16 divisors (see below), whose sum is σ = 21422016. Its totient is φ = 15099840.

The previous prime is 18113939. The next prime is 18113957. The reversal of 18113953 is 35931181.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18113953 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18113957) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27850 + ... + 28492.

It is an arithmetic number, because the mean of its divisors is an integer number (1338876).

Almost surely, 2^18113953 is an apocalyptic number.

18113953 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

18113953 is a deficient number, since it is larger than the sum of its proper divisors (3308063).

18113953 is a wasteful number, since it uses less digits than its factorization.

18113953 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 864.

The product of its digits is 3240, while the sum is 31.

The square root of 18113953 is about 4256.0489893797. The cubic root of 18113953 is about 262.6260159878.

The spelling of 18113953 in words is "eighteen million, one hundred thirteen thousand, nine hundred fifty-three".