19843372961 has 8 divisors (see below), whose sum is σ = 21011917824. Its totient is φ = 18674971200.

The previous prime is 19843372943. The next prime is 19843372963. The reversal of 19843372961 is 16927334891.

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

It is a cyclic number.

It is not a de Polignac number, because 19843372961 - 2⁶ = 19843372897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19843372963) 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, 404936 + ... + 451286.

It is an arithmetic number, because the mean of its divisors is an integer number (2626489728).

Almost surely, 2^19843372961 is an apocalyptic number.

It is an amenable number.

19843372961 is a deficient number, since it is larger than the sum of its proper divisors (1168544863).

19843372961 is a wasteful number, since it uses less digits than its factorization.

19843372961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71551.

The product of its digits is 1959552, while the sum is 53.

The spelling of 19843372961 in words is "nineteen billion, eight hundred forty-three million, three hundred seventy-two thousand, nine hundred sixty-one".