186380691021 has 12 divisors (see below), whose sum is σ = 307676061472. Its totient is φ = 106503251976.

The previous prime is 186380690989. The next prime is 186380691131. The reversal of 186380691021 is 120196083681.

186380691021 is a `hidden beast` number, since 1 + 8 + 638 + 0 + 6 + 9 + 1 + 0 + 2 + 1 = 666.

It is not a de Polignac number, because 186380691021 - 2⁵ = 186380690989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (186380691221) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1479211771 + ... + 1479211896.

Almost surely, 2^186380691021 is an apocalyptic number.

It is an amenable number.

186380691021 is a deficient number, since it is larger than the sum of its proper divisors (121295370451).

186380691021 is a wasteful number, since it uses less digits than its factorization.

186380691021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2958423680 (or 2958423677 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 45.

The spelling of 186380691021 in words is "one hundred eighty-six billion, three hundred eighty million, six hundred ninety-one thousand, twenty-one".