19238974860 has 144 divisors (see below), whose sum is σ = 64121815296. Its totient is φ = 4295184768.

The previous prime is 19238974823. The next prime is 19238974861. The reversal of 19238974860 is 6847983291.

It is a self number, because there is not a number n which added to its sum of digits gives 19238974860.

It is not an unprimeable number, because it can be changed into a prime (19238974861) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 50329 + ... + 202511.

It is an arithmetic number, because the mean of its divisors is an integer number (445290384).

Almost surely, 2^19238974860 is an apocalyptic number.

19238974860 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 19238974860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32060907648).

19238974860 is an abundant number, since it is smaller than the sum of its proper divisors (44882840436).

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

19238974860 is a wasteful number, since it uses less digits than its factorization.

19238974860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152252 (or 152243 counting only the distinct ones).

The product of its (nonzero) digits is 5225472, while the sum is 57.

The spelling of 19238974860 in words is "nineteen billion, two hundred thirty-eight million, nine hundred seventy-four thousand, eight hundred sixty".