189672458020 has 24 divisors (see below), whose sum is σ = 398353544568. Its totient is φ = 75861100800.

The previous prime is 189672458009. The next prime is 189672458077. The reversal of 189672458020 is 20854276981.

It can be written as a sum of positive squares in 4 ways, for example, as 1927034404 + 187745423616 = 43898^2 + 433296^2 .

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, 293371 + ... + 682210.

It is an arithmetic number, because the mean of its divisors is an integer number (16598064357).

Almost surely, 2^189672458020 is an apocalyptic number.

189672458020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

189672458020 is an abundant number, since it is smaller than the sum of its proper divisors (208681086548).

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

189672458020 is a wasteful number, since it uses less digits than its factorization.

189672458020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 985311 (or 985309 counting only the distinct ones).

The product of its (nonzero) digits is 1935360, while the sum is 52.

The spelling of 189672458020 in words is "one hundred eighty-nine billion, six hundred seventy-two million, four hundred fifty-eight thousand, twenty".