19661973294 has 8 divisors (see below), whose sum is σ = 39323946600. Its totient is φ = 6553991096.

The previous prime is 19661973241. The next prime is 19661973301. The reversal of 19661973294 is 49237916691.

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

19661973294 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1638497769 + ... + 1638497780.

It is an arithmetic number, because the mean of its divisors is an integer number (4915493325).

Almost surely, 2^19661973294 is an apocalyptic number.

19661973294 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19661973294 is a wasteful number, since it uses less digits than its factorization.

19661973294 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3276995554.

The product of its digits is 4408992, while the sum is 57.

The spelling of 19661973294 in words is "nineteen billion, six hundred sixty-one million, nine hundred seventy-three thousand, two hundred ninety-four".