19000690344 has 80 divisors (see below), whose sum is σ = 53487324000. Its totient is φ = 6301693728.

The previous prime is 19000690309. The next prime is 19000690381. The reversal of 19000690344 is 44309600091.

It is a super-2 number, since 2×19000690344² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 19000690299 and 19000690308.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 55279 + ... + 202625.

It is an arithmetic number, because the mean of its divisors is an integer number (668591550).

Almost surely, 2^19000690344 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19000690344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26743662000).

19000690344 is an abundant number, since it is smaller than the sum of its proper divisors (34486633656).

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

19000690344 is a wasteful number, since it uses less digits than its factorization.

19000690344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147564 (or 147551 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

The spelling of 19000690344 in words is "nineteen billion, six hundred ninety thousand, three hundred forty-four".