18521914 has 16 divisors (see below), whose sum is σ = 28740096. Its totient is φ = 8946400.

The previous prime is 18521897. The next prime is 18521927. The reversal of 18521914 is 41912581.

It is a happy number.

It is a super-2 number, since 2×18521914² = 686122596446792, which contains 22 as substring.

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, 7719 + ... + 9829.

It is an arithmetic number, because the mean of its divisors is an integer number (1796256).

Almost surely, 2^18521914 is an apocalyptic number.

18521914 is a deficient number, since it is larger than the sum of its proper divisors (10218182).

18521914 is a wasteful number, since it uses less digits than its factorization.

18521914 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2261.

The product of its digits is 2880, while the sum is 31.

The square root of 18521914 is about 4303.7093303335. The cubic root of 18521914 is about 264.5830109791.

The spelling of 18521914 in words is "eighteen million, five hundred twenty-one thousand, nine hundred fourteen".