19172833157 has 16 divisors (see below), whose sum is σ = 20028662640. Its totient is φ = 18336115200.

The previous prime is 19172833153. The next prime is 19172833171. The reversal of 19172833157 is 75133827191.

It is a happy number.

It is a Cunningham number, because it is equal to 138466²+1.

It can be written as a sum of positive squares in 8 ways, for example, as 5351068801 + 13821764356 = 73151^2 + 117566^2 .

It is a cyclic number.

It is not a de Polignac number, because 19172833157 - 2² = 19172833153 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19172833151) 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, 2997719 + ... + 3004107.

It is an arithmetic number, because the mean of its divisors is an integer number (1251791415).

Almost surely, 2^19172833157 is an apocalyptic number.

It is an amenable number.

19172833157 is a deficient number, since it is larger than the sum of its proper divisors (855829483).

19172833157 is a wasteful number, since it uses less digits than its factorization.

19172833157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7864.

The product of its digits is 317520, while the sum is 47.

The spelling of 19172833157 in words is "nineteen billion, one hundred seventy-two million, eight hundred thirty-three thousand, one hundred fifty-seven".