189907999980 has 24 divisors (see below), whose sum is σ = 531742400112. Its totient is φ = 50642133312.

The previous prime is 189907999979. The next prime is 189908000011. The reversal of 189907999980 is 89999709981.

It is a junction number, because it is equal to n+sod(n) for n = 189907999896 and 189907999905.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1582566607 + ... + 1582566726.

It is an arithmetic number, because the mean of its divisors is an integer number (22155933338).

Almost surely, 2^189907999980 is an apocalyptic number.

189907999980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

189907999980 is an abundant number, since it is smaller than the sum of its proper divisors (341834400132).

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

189907999980 is a wasteful number, since it uses less digits than its factorization.

189907999980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3165133345 (or 3165133343 counting only the distinct ones).

The product of its (nonzero) digits is 238085568, while the sum is 78.

The spelling of 189907999980 in words is "one hundred eighty-nine billion, nine hundred seven million, nine hundred ninety-nine thousand, nine hundred eighty".