19239812772 has 24 divisors (see below), whose sum is σ = 44895186336. Its totient is φ = 6412943808.

The previous prime is 19239812723. The next prime is 19239812819. The reversal of 19239812772 is 27721893291.

It is a super-2 number, since 2×19239812772² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 366648 + ... + 415824.

It is an arithmetic number, because the mean of its divisors is an integer number (1870632764).

Almost surely, 2^19239812772 is an apocalyptic number.

19239812772 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

19239812772 is an abundant number, since it is smaller than the sum of its proper divisors (25655373564).

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

19239812772 is a wasteful number, since it uses less digits than its factorization.

19239812772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81787 (or 81785 counting only the distinct ones).

The product of its digits is 762048, while the sum is 51.

The spelling of 19239812772 in words is "nineteen billion, two hundred thirty-nine million, eight hundred twelve thousand, seven hundred seventy-two".