19894512351 has 16 divisors (see below), whose sum is σ = 31134785024. Its totient is φ = 11061041184.

The previous prime is 19894512317. The next prime is 19894512389. The reversal of 19894512351 is 15321549891.

It is not a de Polignac number, because 19894512351 - 2⁷ = 19894512223 is a prime.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 19894512351.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19894512751) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12801355 + ... + 12802908.

It is an arithmetic number, because the mean of its divisors is an integer number (1945924064).

Almost surely, 2^19894512351 is an apocalyptic number.

19894512351 is a deficient number, since it is larger than the sum of its proper divisors (11240272673).

19894512351 is a wasteful number, since it uses less digits than its factorization.

19894512351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25604310.

The product of its digits is 388800, while the sum is 48.

The spelling of 19894512351 in words is "nineteen billion, eight hundred ninety-four million, five hundred twelve thousand, three hundred fifty-one".