19317721230 has 48 divisors (see below), whose sum is σ = 52869557520. Its totient is φ = 4880265984.

The previous prime is 19317721219. The next prime is 19317721261. The reversal of 19317721230 is 3212771391.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5646747 + ... + 5650166.

It is an arithmetic number, because the mean of its divisors is an integer number (1101449115).

Almost surely, 2^19317721230 is an apocalyptic number.

19317721230 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19317721230 is an abundant number, since it is smaller than the sum of its proper divisors (33551836290).

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

19317721230 is a wasteful number, since it uses less digits than its factorization.

19317721230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11296945 (or 11296942 counting only the distinct ones).

The product of its (nonzero) digits is 15876, while the sum is 36.

The spelling of 19317721230 in words is "nineteen billion, three hundred seventeen million, seven hundred twenty-one thousand, two hundred thirty".