18432073 has 16 divisors (see below), whose sum is σ = 20938752. Its totient is φ = 16074000.

The previous prime is 18432049. The next prime is 18432103. The reversal of 18432073 is 37023481.

It is a cyclic number.

It is not a de Polignac number, because 18432073 - 2⁵ = 18432041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18432473) 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, 64990 + ... + 65272.

It is an arithmetic number, because the mean of its divisors is an integer number (1308672).

Almost surely, 2^18432073 is an apocalyptic number.

It is an amenable number.

18432073 is a deficient number, since it is larger than the sum of its proper divisors (2506679).

18432073 is a wasteful number, since it uses less digits than its factorization.

18432073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 516.

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 18432073 is about 4293.2590185080. The cubic root of 18432073 is about 264.1545286390.

It can be divided in two parts, 1843 and 2073, that added together give a triangular number (3916 = T₈₈).

The spelling of 18432073 in words is "eighteen million, four hundred thirty-two thousand, seventy-three".