18922772 has 24 divisors (see below), whose sum is σ = 37293312. Its totient is φ = 8323200.

The previous prime is 18922769. The next prime is 18922777. The reversal of 18922772 is 27722981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18922777) 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, 5573 + ... + 8300.

It is an arithmetic number, because the mean of its divisors is an integer number (1553888).

Almost surely, 2^18922772 is an apocalyptic number.

It is an amenable number.

18922772 is a deficient number, since it is larger than the sum of its proper divisors (18370540).

18922772 is a wasteful number, since it uses less digits than its factorization.

18922772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13919 (or 13917 counting only the distinct ones).

The product of its digits is 28224, while the sum is 38.

The square root of 18922772 is about 4350.0312642555. The cubic root of 18922772 is about 266.4781382731.

It can be divided in two parts, 1892 and 2772, that added together give a palindrome (4664).

The spelling of 18922772 in words is "eighteen million, nine hundred twenty-two thousand, seven hundred seventy-two".