18690772 has 24 divisors (see below), whose sum is σ = 34320384. Its totient is φ = 8896032.

The previous prime is 18690739. The next prime is 18690797. The reversal of 18690772 is 27709681.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5613 + ... + 8299.

It is an arithmetic number, because the mean of its divisors is an integer number (1430016).

Almost surely, 2^18690772 is an apocalyptic number.

It is an amenable number.

18690772 is a deficient number, since it is larger than the sum of its proper divisors (15629612).

18690772 is a wasteful number, since it uses less digits than its factorization.

18690772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2775 (or 2773 counting only the distinct ones).

The product of its (nonzero) digits is 42336, while the sum is 40.

The square root of 18690772 is about 4323.2825491749. The cubic root of 18690772 is about 265.3846177198.

The spelling of 18690772 in words is "eighteen million, six hundred ninety thousand, seven hundred seventy-two".