189910213490 has 16 divisors (see below), whose sum is σ = 343344284352. Its totient is φ = 75629440944.

The previous prime is 189910213481. The next prime is 189910213511. The reversal of 189910213490 is 94312019981.

It is a Curzon number.

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, 41828174 + ... + 41832713.

It is an arithmetic number, because the mean of its divisors is an integer number (21459017772).

Almost surely, 2^189910213490 is an apocalyptic number.

189910213490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

189910213490 is a deficient number, since it is larger than the sum of its proper divisors (153434070862).

189910213490 is a wasteful number, since it uses less digits than its factorization.

189910213490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83661121.

The product of its (nonzero) digits is 139968, while the sum is 47.

The spelling of 189910213490 in words is "one hundred eighty-nine billion, nine hundred ten million, two hundred thirteen thousand, four hundred ninety".