18432645 has 32 divisors (see below), whose sum is σ = 36771840. Its totient is φ = 7659840.

The previous prime is 18432629. The next prime is 18432647. The reversal of 18432645 is 54623481.

It is not a de Polignac number, because 18432645 - 2⁴ = 18432629 is a prime.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18432647) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6825 + ... + 9134.

It is an arithmetic number, because the mean of its divisors is an integer number (1149120).

Almost surely, 2^18432645 is an apocalyptic number.

18432645 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18432645 is a deficient number, since it is larger than the sum of its proper divisors (18339195).

18432645 is a wasteful number, since it uses less digits than its factorization.

18432645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15985.

The product of its digits is 23040, while the sum is 33.

The square root of 18432645 is about 4293.3256340511. The cubic root of 18432645 is about 264.1572611011.

The spelling of 18432645 in words is "eighteen million, four hundred thirty-two thousand, six hundred forty-five".