194532206921 has 16 divisors (see below), whose sum is σ = 212267247360. Its totient is φ = 177195582720.

The previous prime is 194532206917. The next prime is 194532206929. The reversal of 194532206921 is 129602235491.

It is a happy number.

It is not a de Polignac number, because 194532206921 - 2² = 194532206917 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (194532206929) 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, 1807601 + ... + 1912193.

It is an arithmetic number, because the mean of its divisors is an integer number (13266702960).

Almost surely, 2^194532206921 is an apocalyptic number.

It is an amenable number.

194532206921 is a deficient number, since it is larger than the sum of its proper divisors (17735040439).

194532206921 is a wasteful number, since it uses less digits than its factorization.

194532206921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106496.

The product of its (nonzero) digits is 233280, while the sum is 44.

The spelling of 194532206921 in words is "one hundred ninety-four billion, five hundred thirty-two million, two hundred six thousand, nine hundred twenty-one".