18862000921 has 3 divisors (see below), whose sum is σ = 18862138261. Its totient is φ = 18861863582.

The previous prime is 18862000919. The next prime is 18862000951. The reversal of 18862000921 is 12900026881.

The square root of 18862000921 is 137339.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 18862000921 - 2¹ = 18862000919 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18862000951) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 68670 + ... + 206008.

Almost surely, 2^18862000921 is an apocalyptic number.

18862000921 is the 137339-th square number.

18862000921 is the 68670-th centered octagonal number.

It is an amenable number.

18862000921 is a deficient number, since it is larger than the sum of its proper divisors (137340).

18862000921 is an frugal number, since it uses more digits than its factorization.

18862000921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274678 (or 137339 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 37.

The spelling of 18862000921 in words is "eighteen billion, eight hundred sixty-two million, nine hundred twenty-one", and thus it is an aban number.