19694665740393 has 32 divisors (see below), whose sum is σ = 33348618259200. Its totient is φ = 11253030755328.

The previous prime is 19694665740391. The next prime is 19694665740397. The reversal of 19694665740393 is 39304756649691.

19694665740393 is a `hidden beast` number, since 1 + 9 + 6 + 9 + 46 + 6 + 574 + 0 + 3 + 9 + 3 = 666.

It is not a de Polignac number, because 19694665740393 - 2¹ = 19694665740391 is a prime.

It is not an unprimeable number, because it can be changed into a prime (19694665740391) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2919096 + ... + 6921737.

It is an arithmetic number, because the mean of its divisors is an integer number (1042144320600).

Almost surely, 2^{19694665740393} is an apocalyptic number.

It is an amenable number.

19694665740393 is a deficient number, since it is larger than the sum of its proper divisors (13653952518807).

19694665740393 is a wasteful number, since it uses less digits than its factorization.

19694665740393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9851438 (or 9851432 counting only the distinct ones).

The product of its (nonzero) digits is 793618560, while the sum is 72.

The spelling of 19694665740393 in words is "nineteen trillion, six hundred ninety-four billion, six hundred sixty-five million, seven hundred forty thousand, three hundred ninety-three".