19674720340 has 96 divisors (see below), whose sum is σ = 45448542720. Its totient is φ = 7095120000.

The previous prime is 19674720323. The next prime is 19674720361. The reversal of 19674720340 is 4302747691.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15626631 + ... + 15627889.

It is an arithmetic number, because the mean of its divisors is an integer number (473422320).

Almost surely, 2^19674720340 is an apocalyptic number.

19674720340 is a gapful number since it is divisible by the number (10) 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 19674720340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22724271360).

19674720340 is an abundant number, since it is smaller than the sum of its proper divisors (25773822380).

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

19674720340 is a wasteful number, since it uses less digits than its factorization.

19674720340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1813 (or 1811 counting only the distinct ones).

The product of its (nonzero) digits is 254016, while the sum is 43.

The spelling of 19674720340 in words is "nineteen billion, six hundred seventy-four million, seven hundred twenty thousand, three hundred forty".