19291093172 has 24 divisors (see below), whose sum is σ = 36360070152. Its totient is φ = 8902656000.

The previous prime is 19291093109. The next prime is 19291093231. The reversal of 19291093172 is 27139019291.

It can be written as a sum of positive squares in 4 ways, for example, as 1183084816 + 18108008356 = 34396^2 + 134566^2 .

It is a congruent 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, 946772 + ... + 966932.

It is an arithmetic number, because the mean of its divisors is an integer number (1515002923).

Almost surely, 2^19291093172 is an apocalyptic number.

It is an amenable number.

19291093172 is a deficient number, since it is larger than the sum of its proper divisors (17068976980).

19291093172 is a wasteful number, since it uses less digits than its factorization.

19291093172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38579 (or 38577 counting only the distinct ones).

The product of its (nonzero) digits is 61236, while the sum is 44.

The spelling of 19291093172 in words is "nineteen billion, two hundred ninety-one million, ninety-three thousand, one hundred seventy-two".