18997852 has 6 divisors (see below), whose sum is σ = 33246248. Its totient is φ = 9498924.

The previous prime is 18997843. The next prime is 18997877. The reversal of 18997852 is 25879981.

It is a super-2 number, since 2×18997852² = 721836761227808, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 18997796 and 18997805.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 2374728 + ... + 2374735.

Almost surely, 2^18997852 is an apocalyptic number.

It is an amenable number.

18997852 is a deficient number, since it is larger than the sum of its proper divisors (14248396).

18997852 is a wasteful number, since it uses less digits than its factorization.

18997852 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4749467 (or 4749465 counting only the distinct ones).

The product of its digits is 362880, while the sum is 49.

The square root of 18997852 is about 4358.6525440783. The cubic root of 18997852 is about 266.8301088323.

The spelling of 18997852 in words is "eighteen million, nine hundred ninety-seven thousand, eight hundred fifty-two".