18442953 has 12 divisors (see below), whose sum is σ = 26692848. Its totient is φ = 12270840.

The previous prime is 18442891. The next prime is 18442967. The reversal of 18442953 is 35924481.

18442953 is a `hidden beast` number, since 184 + 429 + 53 = 666.

It is not a de Polignac number, because 18442953 - 2⁹ = 18442441 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18442153) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3538 + ... + 7028.

It is an arithmetic number, because the mean of its divisors is an integer number (2224404).

Almost surely, 2^18442953 is an apocalyptic number.

It is an amenable number.

18442953 is a deficient number, since it is larger than the sum of its proper divisors (8249895).

18442953 is a wasteful number, since it uses less digits than its factorization.

18442953 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4084 (or 4081 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The square root of 18442953 is about 4294.5259342563. The cubic root of 18442953 is about 264.2064930594.

The spelling of 18442953 in words is "eighteen million, four hundred forty-two thousand, nine hundred fifty-three".