188040562021 has 4 divisors (see below), whose sum is σ = 202505220652. Its totient is φ = 173575903392.

The previous prime is 188040562013. The next prime is 188040562033. The reversal of 188040562021 is 120265040881.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 39884084100 + 148156477921 = 199710^2 + 384911^2 .

It is a cyclic number.

It is not a de Polignac number, because 188040562021 - 2³ = 188040562013 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 (188040562001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7232329296 + ... + 7232329321.

It is an arithmetic number, because the mean of its divisors is an integer number (50626305163).

Almost surely, 2^188040562021 is an apocalyptic number.

It is an amenable number.

188040562021 is a deficient number, since it is larger than the sum of its proper divisors (14464658631).

188040562021 is a wasteful number, since it uses less digits than its factorization.

188040562021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14464658630.

The product of its (nonzero) digits is 30720, while the sum is 37.

The spelling of 188040562021 in words is "one hundred eighty-eight billion, forty million, five hundred sixty-two thousand, twenty-one".