186053332921 has 3 divisors (see below), whose sum is σ = 186053764261. Its totient is φ = 186052901582.

The previous prime is 186053332891. The next prime is 186053332931. The reversal of 186053332921 is 129233350681.

The square root of 186053332921 is 431339.

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 186053332921 - 2⁷ = 186053332793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (186053332931) 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, 215670 + ... + 647008.

Almost surely, 2^186053332921 is an apocalyptic number.

186053332921 is the 431339-th square number.

186053332921 is the 215670-th centered octagonal number.

It is an amenable number.

186053332921 is a deficient number, since it is larger than the sum of its proper divisors (431340).

186053332921 is an frugal number, since it uses more digits than its factorization.

186053332921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 862678 (or 431339 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 43.

The spelling of 186053332921 in words is "one hundred eighty-six billion, fifty-three million, three hundred thirty-two thousand, nine hundred twenty-one".