19018031232 has 32 divisors (see below), whose sum is σ = 50516646480. Its totient is φ = 6339343616.

The previous prime is 19018031231. The next prime is 19018031251. The reversal of 19018031232 is 23213081091.

It is a tau number, because it is divible by the number of its divisors (32).

It is a self number, because there is not a number n which added to its sum of digits gives 19018031232.

It is not an unprimeable number, because it can be changed into a prime (19018031231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24762678 + ... + 24763445.

Almost surely, 2^19018031232 is an apocalyptic number.

19018031232 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

19018031232 is an abundant number, since it is smaller than the sum of its proper divisors (31498615248).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19018031232 is an equidigital number, since it uses as much as digits as its factorization.

19018031232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49526140 (or 49526128 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 30.

The spelling of 19018031232 in words is "nineteen billion, eighteen million, thirty-one thousand, two hundred thirty-two".