19643034745 has 8 divisors (see below), whose sum is σ = 23573050560. Its totient is φ = 15713488560.

The previous prime is 19643034739. The next prime is 19643034757. The reversal of 19643034745 is 54743034691.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 19643034745 - 2⁵ = 19643034713 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 19643034695 and 19643034704.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17685 + ... + 198994.

It is an arithmetic number, because the mean of its divisors is an integer number (2946631320).

Almost surely, 2^19643034745 is an apocalyptic number.

It is an amenable number.

19643034745 is a deficient number, since it is larger than the sum of its proper divisors (3930015815).

19643034745 is a wasteful number, since it uses less digits than its factorization.

19643034745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 234815.

The product of its (nonzero) digits is 1088640, while the sum is 46.

The spelling of 19643034745 in words is "nineteen billion, six hundred forty-three million, thirty-four thousand, seven hundred forty-five".