18922453 has 4 divisors (see below), whose sum is σ = 20642688. Its totient is φ = 17202220.

The previous prime is 18922433. The next prime is 18922483. The reversal of 18922453 is 35422981.

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: 35422981 = 11 ⋅3220271.

It is a cyclic number.

It is not a de Polignac number, because 18922453 - 2⁹ = 18921941 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18922433) 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, 860101 + ... + 860122.

It is an arithmetic number, because the mean of its divisors is an integer number (5160672).

Almost surely, 2^18922453 is an apocalyptic number.

It is an amenable number.

18922453 is a deficient number, since it is larger than the sum of its proper divisors (1720235).

18922453 is a wasteful number, since it uses less digits than its factorization.

18922453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1720234.

The product of its digits is 17280, while the sum is 34.

The square root of 18922453 is about 4349.9945976978. The cubic root of 18922453 is about 266.4766408356.

The spelling of 18922453 in words is "eighteen million, nine hundred twenty-two thousand, four hundred fifty-three".