210686448042 has 24 divisors (see below), whose sum is σ = 521699776416. Its totient is φ = 60196127976.

The previous prime is 210686448013. The next prime is 210686448047. The reversal of 210686448042 is 240844686012.

210686448042 is a `hidden beast` number, since 2 + 10 + 68 + 64 + 480 + 42 = 666.

It is not an unprimeable number, because it can be changed into a prime (210686448047) 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, 836057208 + ... + 836057459.

It is an arithmetic number, because the mean of its divisors is an integer number (21737490684).

Almost surely, 2^210686448042 is an apocalyptic number.

210686448042 is an abundant number, since it is smaller than the sum of its proper divisors (311013328374).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

210686448042 is a wasteful number, since it uses less digits than its factorization.

210686448042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1672114682 (or 1672114679 counting only the distinct ones).

The product of its (nonzero) digits is 589824, while the sum is 45.

The spelling of 210686448042 in words is "two hundred ten billion, six hundred eighty-six million, four hundred forty-eight thousand, forty-two".