188534021 has 16 divisors (see below), whose sum is σ = 206236800. Its totient is φ = 171312960.

The previous prime is 188533997. The next prime is 188534041. The reversal of 188534021 is 120435881.

188534021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 188534021 - 2¹⁰ = 188532997 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 (188534041) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 253376 + ... + 254118.

It is an arithmetic number, because the mean of its divisors is an integer number (12889800).

Almost surely, 2^188534021 is an apocalyptic number.

It is an amenable number.

188534021 is a deficient number, since it is larger than the sum of its proper divisors (17702779).

188534021 is a wasteful number, since it uses less digits than its factorization.

188534021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1036.

The product of its (nonzero) digits is 7680, while the sum is 32.

The square root of 188534021 is about 13730.7691335919. The cubic root of 188534021 is about 573.4073340198.

The spelling of 188534021 in words is "one hundred eighty-eight million, five hundred thirty-four thousand, twenty-one".