18922641 has 8 divisors (see below), whose sum is σ = 25453920. Its totient is φ = 12503232.

The previous prime is 18922637. The next prime is 18922669. The reversal of 18922641 is 14622981.

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

It is not a de Polignac number, because 18922641 - 2² = 18922637 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18922601) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27571 + ... + 28248.

It is an arithmetic number, because the mean of its divisors is an integer number (3181740).

Almost surely, 2^18922641 is an apocalyptic number.

It is an amenable number.

18922641 is a deficient number, since it is larger than the sum of its proper divisors (6531279).

18922641 is a wasteful number, since it uses less digits than its factorization.

18922641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55935.

The product of its digits is 6912, while the sum is 33.

The square root of 18922641 is about 4350.0162068664. The cubic root of 18922641 is about 266.4775233400.

The spelling of 18922641 in words is "eighteen million, nine hundred twenty-two thousand, six hundred forty-one".