19000307172 has 96 divisors (see below), whose sum is σ = 55730755584. Its totient is φ = 4935115680.

The previous prime is 19000307167. The next prime is 19000307177. The reversal of 19000307172 is 27170300091.

It is an interprime number because it is at equal distance from previous prime (19000307167) and next prime (19000307177).

It is a super-2 number, since 2×19000307172² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (19000307177) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 26833 + ... + 196775.

It is an arithmetic number, because the mean of its divisors is an integer number (580528704).

Almost surely, 2^19000307172 is an apocalyptic number.

19000307172 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 19000307172, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27865377792).

19000307172 is an abundant number, since it is smaller than the sum of its proper divisors (36730448412).

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

19000307172 is a wasteful number, since it uses less digits than its factorization.

19000307172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169990 (or 169966 counting only the distinct ones).

The product of its (nonzero) digits is 2646, while the sum is 30.

The spelling of 19000307172 in words is "nineteen billion, three hundred seven thousand, one hundred seventy-two".