18897412 has 6 divisors (see below), whose sum is σ = 33070478. Its totient is φ = 9448704.

The previous prime is 18897391. The next prime is 18897449. The reversal of 18897412 is 21479881.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 18181696 + 715716 = 4264^2 + 846^2 .

It is a super-2 number, since 2×18897412² = 714224360595488, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2362173 + ... + 2362180.

Almost surely, 2^18897412 is an apocalyptic number.

It is an amenable number.

18897412 is a deficient number, since it is larger than the sum of its proper divisors (14173066).

18897412 is a wasteful number, since it uses less digits than its factorization.

18897412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4724357 (or 4724355 counting only the distinct ones).

The product of its digits is 32256, while the sum is 40.

The square root of 18897412 is about 4347.1153653889. The cubic root of 18897412 is about 266.3590417902.

The spelling of 18897412 in words is "eighteen million, eight hundred ninety-seven thousand, four hundred twelve".