19817063234 has 16 divisors (see below), whose sum is σ = 31853370528. Its totient is φ = 9213317952.

The previous prime is 19817063219. The next prime is 19817063239. The reversal of 19817063234 is 43236071891.

It is not an unprimeable number, because it can be changed into a prime (19817063239) 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, 3508352 + ... + 3513995.

It is an arithmetic number, because the mean of its divisors is an integer number (1990835658).

Almost surely, 2^19817063234 is an apocalyptic number.

19817063234 is a deficient number, since it is larger than the sum of its proper divisors (12036307294).

19817063234 is a wasteful number, since it uses less digits than its factorization.

19817063234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7022449.

The product of its (nonzero) digits is 217728, while the sum is 44.

The spelling of 19817063234 in words is "nineteen billion, eight hundred seventeen million, sixty-three thousand, two hundred thirty-four".