18003957 has 8 divisors (see below), whose sum is σ = 24243360. Its totient is φ = 11883600.

The previous prime is 18003949. The next prime is 18003989. The reversal of 18003957 is 75930081.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 18003957 - 2³ = 18003949 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18003757) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29407 + ... + 30012.

It is an arithmetic number, because the mean of its divisors is an integer number (3030420).

Almost surely, 2^18003957 is an apocalyptic number.

It is an amenable number.

18003957 is a deficient number, since it is larger than the sum of its proper divisors (6239403).

18003957 is a wasteful number, since it uses less digits than its factorization.

18003957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59523.

The product of its (nonzero) digits is 7560, while the sum is 33.

The square root of 18003957 is about 4243.1069984152. The cubic root of 18003957 is about 262.0933422244.

The spelling of 18003957 in words is "eighteen million, three thousand, nine hundred fifty-seven".