18672923 has 2 divisors, whose sum is σ = 18672924. Its totient is φ = 18672922.

The previous prime is 18672859. The next prime is 18672931. The reversal of 18672923 is 32927681.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18672923 - 2⁶ = 18672859 is a prime.

It is not a weakly prime, because it can be changed into another prime (18671923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9336461 + 9336462.

It is an arithmetic number, because the mean of its divisors is an integer number (9336462).

Almost surely, 2^18672923 is an apocalyptic number.

18672923 is a deficient number, since it is larger than the sum of its proper divisors (1).

18672923 is an equidigital number, since it uses as much as digits as its factorization.

18672923 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36288, while the sum is 38.

The square root of 18672923 is about 4321.2177681760. The cubic root of 18672923 is about 265.3001132973.

The spelling of 18672923 in words is "eighteen million, six hundred seventy-two thousand, nine hundred twenty-three".