19831024138 has 16 divisors (see below), whose sum is σ = 30136020480. Its totient is φ = 9785792016.

The previous prime is 19831024133. The next prime is 19831024139. The reversal of 19831024138 is 83142013891.

It is a self number, because there is not a number n which added to its sum of digits gives 19831024138.

It is not an unprimeable number, because it can be changed into a prime (19831024133) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 359295 + ... + 410797.

It is an arithmetic number, because the mean of its divisors is an integer number (1883501280).

Almost surely, 2^19831024138 is an apocalyptic number.

19831024138 is a deficient number, since it is larger than the sum of its proper divisors (10304996342).

19831024138 is a wasteful number, since it uses less digits than its factorization.

19831024138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54021.

The product of its (nonzero) digits is 41472, while the sum is 40.

The spelling of 19831024138 in words is "nineteen billion, eight hundred thirty-one million, twenty-four thousand, one hundred thirty-eight".