18446923 has 4 divisors (see below), whose sum is σ = 20123928. Its totient is φ = 16769920.

The previous prime is 18446917. The next prime is 18446927. The reversal of 18446923 is 32964481.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 18446923 - 2¹³ = 18438731 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18446927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 838486 + ... + 838507.

It is an arithmetic number, because the mean of its divisors is an integer number (5030982).

Almost surely, 2^18446923 is an apocalyptic number.

18446923 is a deficient number, since it is larger than the sum of its proper divisors (1677005).

18446923 is a wasteful number, since it uses less digits than its factorization.

18446923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1677004.

The product of its digits is 41472, while the sum is 37.

The square root of 18446923 is about 4294.9881257112. The cubic root of 18446923 is about 264.2254492523.

The spelling of 18446923 in words is "eighteen million, four hundred forty-six thousand, nine hundred twenty-three".