196989185920 has 32 divisors (see below), whose sum is σ = 470927274120. Its totient is φ = 78795674112.

The previous prime is 196989185917. The next prime is 196989185977. The reversal of 196989185920 is 29581989691.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 153897162 + ... + 153898441.

Almost surely, 2^196989185920 is an apocalyptic number.

196989185920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

196989185920 is an abundant number, since it is smaller than the sum of its proper divisors (273938088200).

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

196989185920 is an equidigital number, since it uses as much as digits as its factorization.

196989185920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 307795622 (or 307795610 counting only the distinct ones).

The product of its (nonzero) digits is 25194240, while the sum is 67.

The spelling of 196989185920 in words is "one hundred ninety-six billion, nine hundred eighty-nine million, one hundred eighty-five thousand, nine hundred twenty".