189926993872 has 80 divisors (see below), whose sum is σ = 458876880000. Its totient is φ = 73982661120.

The previous prime is 189926993833. The next prime is 189926993873. The reversal of 189926993872 is 278399629981.

It is a super-3 number, since 3×189926993872³ (a number of 35 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 189926993795 and 189926993804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189926993873) 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, 7661754 + ... + 7686502.

It is an arithmetic number, because the mean of its divisors is an integer number (5735961000).

Almost surely, 2^189926993872 is an apocalyptic number.

It is an amenable number.

189926993872 is an abundant number, since it is smaller than the sum of its proper divisors (268949886128).

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

189926993872 is a wasteful number, since it uses less digits than its factorization.

189926993872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31004 (or 30998 counting only the distinct ones).

The product of its digits is 211631616, while the sum is 73.

The spelling of 189926993872 in words is "one hundred eighty-nine billion, nine hundred twenty-six million, nine hundred ninety-three thousand, eight hundred seventy-two".