188810018021 has 8 divisors (see below), whose sum is σ = 190090395000. Its totient is φ = 187529817280.

The previous prime is 188810017997. The next prime is 188810018027. The reversal of 188810018021 is 120810018881.

It can be written as a sum of positive squares in 4 ways, for example, as 5421376900 + 183388641121 = 73630^2 + 428239^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 188810018021 - 2¹⁴ = 188810001637 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 (188810018027) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2669291 + ... + 2739111.

It is an arithmetic number, because the mean of its divisors is an integer number (23761299375).

Almost surely, 2^188810018021 is an apocalyptic number.

It is an amenable number.

188810018021 is a deficient number, since it is larger than the sum of its proper divisors (1280376979).

188810018021 is a wasteful number, since it uses less digits than its factorization.

188810018021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88119.

The product of its (nonzero) digits is 8192, while the sum is 38.

The spelling of 188810018021 in words is "one hundred eighty-eight billion, eight hundred ten million, eighteen thousand, twenty-one".