18356923 has 8 divisors (see below), whose sum is σ = 20932128. Its totient is φ = 15947904.

The previous prime is 18356917. The next prime is 18356927. The reversal of 18356923 is 32965381.

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

It is a de Polignac number, because none of the positive numbers 2^k-18356923 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18356927) 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, 41311 + ... + 41752.

It is an arithmetic number, because the mean of its divisors is an integer number (2616516).

Almost surely, 2^18356923 is an apocalyptic number.

18356923 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

18356923 is a deficient number, since it is larger than the sum of its proper divisors (2575205).

18356923 is a wasteful number, since it uses less digits than its factorization.

18356923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83093.

The product of its digits is 38880, while the sum is 37.

The square root of 18356923 is about 4284.4979869292. The cubic root of 18356923 is about 263.7950419844.

The spelling of 18356923 in words is "eighteen million, three hundred fifty-six thousand, nine hundred twenty-three".