18361923 has 8 divisors (see below), whose sum is σ = 25771200. Its totient is φ = 11596968.

The previous prime is 18361897. The next prime is 18361957. The reversal of 18361923 is 32916381.

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

It is not a de Polignac number, because 18361923 - 2⁶ = 18361859 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 not an unprimeable number, because it can be changed into a prime (18361963) 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, 161013 + ... + 161126.

It is an arithmetic number, because the mean of its divisors is an integer number (3221400).

Almost surely, 2^18361923 is an apocalyptic number.

18361923 is a deficient number, since it is larger than the sum of its proper divisors (7409277).

18361923 is a wasteful number, since it uses less digits than its factorization.

18361923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 322161.

The product of its digits is 7776, while the sum is 33.

The square root of 18361923 is about 4285.0814461338. The cubic root of 18361923 is about 263.8189903603.

The spelling of 18361923 in words is "eighteen million, three hundred sixty-one thousand, nine hundred twenty-three".