19694665740463 has 24 divisors (see below), whose sum is σ = 24321112192512. Its totient is φ = 15846650072064.

The previous prime is 19694665740461. The next prime is 19694665740521. The reversal of 19694665740463 is 36404756649691.

It is not a de Polignac number, because 19694665740463 - 2¹ = 19694665740461 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 19694665740392 and 19694665740401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19694665740461) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 30546570 + ... + 31184647.

It is an arithmetic number, because the mean of its divisors is an integer number (1013379674688).

Almost surely, 2^{19694665740463} is an apocalyptic number.

19694665740463 is a deficient number, since it is larger than the sum of its proper divisors (4626446452049).

19694665740463 is a wasteful number, since it uses less digits than its factorization.

19694665740463 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61731631 (or 61731624 counting only the distinct ones).

The product of its (nonzero) digits is 705438720, while the sum is 70.

The spelling of 19694665740463 in words is "nineteen trillion, six hundred ninety-four billion, six hundred sixty-five million, seven hundred forty thousand, four hundred sixty-three".