18922373 has 4 divisors (see below), whose sum is σ = 18963360. Its totient is φ = 18881388.

The previous prime is 18922367. The next prime is 18922391. The reversal of 18922373 is 37322981.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 37322981 = 97 ⋅384773.

It is a cyclic number.

It is not a de Polignac number, because 18922373 - 2²⁰ = 17873797 is a prime.

It is a super-2 number, since 2×18922373² = 716112399902258, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18922363) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19793 + ... + 20726.

It is an arithmetic number, because the mean of its divisors is an integer number (4740840).

Almost surely, 2^18922373 is an apocalyptic number.

It is an amenable number.

18922373 is a deficient number, since it is larger than the sum of its proper divisors (40987).

18922373 is an equidigital number, since it uses as much as digits as its factorization.

18922373 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40986.

The product of its digits is 18144, while the sum is 35.

The square root of 18922373 is about 4349.9854022744. The cubic root of 18922373 is about 266.4762653001.

The spelling of 18922373 in words is "eighteen million, nine hundred twenty-two thousand, three hundred seventy-three".