199021937670 has 48 divisors (see below), whose sum is σ = 517777032240. Its totient is φ = 53039696832.

The previous prime is 199021937657. The next prime is 199021937677. The reversal of 199021937670 is 76739120991.

It is a happy number.

199021937670 is a `hidden beast` number, since 199 + 0 + 2 + 19 + 376 + 70 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199021937677) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 537229 + ... + 828648.

It is an arithmetic number, because the mean of its divisors is an integer number (10787021505).

Almost surely, 2^199021937670 is an apocalyptic number.

199021937670 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

199021937670 is an abundant number, since it is smaller than the sum of its proper divisors (318755094570).

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

199021937670 is a wasteful number, since it uses less digits than its factorization.

199021937670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1367509 (or 1367506 counting only the distinct ones).

The product of its (nonzero) digits is 1285956, while the sum is 54.

The spelling of 199021937670 in words is "one hundred ninety-nine billion, twenty-one million, nine hundred thirty-seven thousand, six hundred seventy".