19955830272 has 160 divisors (see below), whose sum is σ = 61616484864. Its totient is φ = 5621145600.

The previous prime is 19955830261. The next prime is 19955830277. The reversal of 19955830272 is 27203855991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19955830277) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 750322 + ... + 776462.

Almost surely, 2^19955830272 is an apocalyptic number.

19955830272 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19955830272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30808242432).

19955830272 is an abundant number, since it is smaller than the sum of its proper divisors (41660654592).

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

19955830272 is an equidigital number, since it uses as much as digits as its factorization.

19955830272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26240 (or 26224 counting only the distinct ones).

The product of its (nonzero) digits is 1360800, while the sum is 51.

The spelling of 19955830272 in words is "nineteen billion, nine hundred fifty-five million, eight hundred thirty thousand, two hundred seventy-two".