19018977832 has 32 divisors (see below), whose sum is σ = 35795396520. Its totient is φ = 9473587200.

The previous prime is 19018977829. The next prime is 19018977833. The reversal of 19018977832 is 23877981091.

It can be written as a sum of positive squares in 4 ways, for example, as 13760697636 + 5258280196 = 117306^2 + 72514^2 .

It is not an unprimeable number, because it can be changed into a prime (19018977833) 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, 4853538 + ... + 4857454.

Almost surely, 2^19018977832 is an apocalyptic number.

It is an amenable number.

19018977832 is a deficient number, since it is larger than the sum of its proper divisors (16776418688).

19018977832 is a wasteful number, since it uses less digits than its factorization.

19018977832 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6061 (or 6057 counting only the distinct ones).

The product of its (nonzero) digits is 1524096, while the sum is 55.

The spelling of 19018977832 in words is "nineteen billion, eighteen million, nine hundred seventy-seven thousand, eight hundred thirty-two".