18922845 has 8 divisors (see below), whose sum is σ = 30276576. Its totient is φ = 10092176.

The previous prime is 18922837. The next prime is 18922861. The reversal of 18922845 is 54822981.

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

It is a cyclic number.

It is not a de Polignac number, because 18922845 - 2³ = 18922837 is a prime.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 630747 + ... + 630776.

It is an arithmetic number, because the mean of its divisors is an integer number (3784572).

Almost surely, 2^18922845 is an apocalyptic number.

18922845 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18922845 is a deficient number, since it is larger than the sum of its proper divisors (11353731).

18922845 is a wasteful number, since it uses less digits than its factorization.

18922845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1261531.

The product of its digits is 46080, while the sum is 39.

The square root of 18922845 is about 4350.0396549917. The cubic root of 18922845 is about 266.4784809445.

The spelling of 18922845 in words is "eighteen million, nine hundred twenty-two thousand, eight hundred forty-five".