18233457 has 16 divisors (see below), whose sum is σ = 27675648. Its totient is φ = 10569680.

The previous prime is 18233443. The next prime is 18233461. The reversal of 18233457 is 75433281.

It is not a de Polignac number, because 18233457 - 2⁷ = 18233329 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (18233057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11253 + ... + 12770.

It is an arithmetic number, because the mean of its divisors is an integer number (1729728).

Almost surely, 2^18233457 is an apocalyptic number.

It is an amenable number.

18233457 is a deficient number, since it is larger than the sum of its proper divisors (9442191).

18233457 is a wasteful number, since it uses less digits than its factorization.

18233457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24060.

The product of its digits is 20160, while the sum is 33.

The square root of 18233457 is about 4270.0652219843. The cubic root of 18233457 is about 263.2022953594.

The spelling of 18233457 in words is "eighteen million, two hundred thirty-three thousand, four hundred fifty-seven".