19227433872 has 20 divisors (see below), whose sum is σ = 49670870960. Its totient is φ = 6409144608.

The previous prime is 19227433867. The next prime is 19227433889. The reversal of 19227433872 is 27833472291.

It is a Harshad number since it is a multiple of its sum of digits (48), and also a Moran number because the ratio is a prime number: 400571539 = 19227433872 / (1 + 9 + 2 + 2 + 7 + 4 + 3 + 3 + 8 + 7 + 2).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 200285722 + ... + 200285817.

It is an arithmetic number, because the mean of its divisors is an integer number (2483543548).

Almost surely, 2^19227433872 is an apocalyptic number.

19227433872 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

19227433872 is an abundant number, since it is smaller than the sum of its proper divisors (30443437088).

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

19227433872 is a wasteful number, since it uses less digits than its factorization.

19227433872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400571550 (or 400571544 counting only the distinct ones).

The product of its digits is 1016064, while the sum is 48.

The spelling of 19227433872 in words is "nineteen billion, two hundred twenty-seven million, four hundred thirty-three thousand, eight hundred seventy-two".