19809196272 has 80 divisors (see below), whose sum is σ = 56877550080. Its totient is φ = 6600996288.

The previous prime is 19809196259. The next prime is 19809196291. The reversal of 19809196272 is 27269190891.

19809196272 is a `hidden beast` number, since 1 + 9 + 8 + 0 + 9 + 1 + 9 + 627 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2061463 + ... + 2071049.

It is an arithmetic number, because the mean of its divisors is an integer number (710969376).

Almost surely, 2^19809196272 is an apocalyptic number.

19809196272 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

19809196272 is an abundant number, since it is smaller than the sum of its proper divisors (37068353808).

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

19809196272 is a wasteful number, since it uses less digits than its factorization.

19809196272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14387 (or 14375 counting only the distinct ones).

The product of its (nonzero) digits is 979776, while the sum is 54.

The spelling of 19809196272 in words is "nineteen billion, eight hundred nine million, one hundred ninety-six thousand, two hundred seventy-two".