19312145338 has 16 divisors (see below), whose sum is σ = 31316994720. Its totient is φ = 8900618256.

The previous prime is 19312145329. The next prime is 19312145383. The reversal of 19312145338 is 83354121391.

It is a self number, because there is not a number n which added to its sum of digits gives 19312145338.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6866356 + ... + 6869167.

It is an arithmetic number, because the mean of its divisors is an integer number (1957312170).

Almost surely, 2^19312145338 is an apocalyptic number.

19312145338 is a deficient number, since it is larger than the sum of its proper divisors (12004849382).

19312145338 is a wasteful number, since it uses less digits than its factorization.

19312145338 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13735581.

The product of its digits is 77760, while the sum is 40.

The spelling of 19312145338 in words is "nineteen billion, three hundred twelve million, one hundred forty-five thousand, three hundred thirty-eight".