19190151939172 has 24 divisors (see below), whose sum is σ = 33885013793400. Its totient is φ = 9508744766976.

The previous prime is 19190151939169. The next prime is 19190151939173. The reversal of 19190151939172 is 27193915109191.

It can be written as a sum of positive squares in 4 ways, for example, as 2145012151396 + 17045139787776 = 1464586^2 + 4128576^2 .

It is not an unprimeable number, because it can be changed into a prime (19190151939173) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 131647 + ... + 6196582.

It is an arithmetic number, because the mean of its divisors is an integer number (1411875574725).

Almost surely, 2^{19190151939172} is an apocalyptic number.

It is an amenable number.

19190151939172 is a deficient number, since it is larger than the sum of its proper divisors (14694861854228).

19190151939172 is a wasteful number, since it uses less digits than its factorization.

19190151939172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6335055 (or 6335053 counting only the distinct ones).

The product of its (nonzero) digits is 1377810, while the sum is 58.

The spelling of 19190151939172 in words is "nineteen trillion, one hundred ninety billion, one hundred fifty-one million, nine hundred thirty-nine thousand, one hundred seventy-two".