19694665740432 has 20 divisors (see below), whose sum is σ = 50877886496240. Its totient is φ = 6564888580128.

The previous prime is 19694665740413. The next prime is 19694665740433. The reversal of 19694665740432 is 23404756649691.

It is not an unprimeable number, because it can be changed into a prime (19694665740433) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 205152768082 + ... + 205152768177.

It is an arithmetic number, because the mean of its divisors is an integer number (2543894324812).

Almost surely, 2^{19694665740432} is an apocalyptic number.

19694665740432 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

19694665740432 is an abundant number, since it is smaller than the sum of its proper divisors (31183220755808).

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

19694665740432 is a wasteful number, since it uses less digits than its factorization.

19694665740432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 410305536270 (or 410305536264 counting only the distinct ones).

The product of its (nonzero) digits is 235146240, while the sum is 66.

The spelling of 19694665740432 in words is "nineteen trillion, six hundred ninety-four billion, six hundred sixty-five million, seven hundred forty thousand, four hundred thirty-two".