18945822 has 32 divisors (see below), whose sum is σ = 43471872. Its totient is φ = 5392224.

The previous prime is 18945821. The next prime is 18945877. The reversal of 18945822 is 22854981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18945821) 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 15 ways as a sum of consecutive naturals, for example, 12603 + ... + 14025.

It is an arithmetic number, because the mean of its divisors is an integer number (1358496).

Almost surely, 2^18945822 is an apocalyptic number.

18945822 is an abundant number, since it is smaller than the sum of its proper divisors (24526050).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18945822 is a wasteful number, since it uses less digits than its factorization.

18945822 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1752.

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

The square root of 18945822 is about 4352.6798641756. The cubic root of 18945822 is about 266.5862941812.

The spelling of 18945822 in words is "eighteen million, nine hundred forty-five thousand, eight hundred twenty-two".