19031297904 has 240 divisors, whose sum is σ = 57911293440. Its totient is φ = 5811456000.

The previous prime is 19031297897. The next prime is 19031297953. The reversal of 19031297904 is 40979213091.

It is a self number, because there is not a number n which added to its sum of digits gives 19031297904.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 28878727 + ... + 28879385.

It is an arithmetic number, because the mean of its divisors is an integer number (241297056).

Almost surely, 2^19031297904 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 19031297904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28955646720).

19031297904 is an abundant number, since it is smaller than the sum of its proper divisors (38879995536).

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

19031297904 is a wasteful number, since it uses less digits than its factorization.

19031297904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 988 (or 979 counting only the distinct ones).

The product of its (nonzero) digits is 122472, while the sum is 45.

The spelling of 19031297904 in words is "nineteen billion, thirty-one million, two hundred ninety-seven thousand, nine hundred four".