19642693601 has 8 divisors (see below), whose sum is σ = 20683111680. Its totient is φ = 18602934768.

The previous prime is 19642693583. The next prime is 19642693667. The reversal of 19642693601 is 10639624691.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19642693601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19642693001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 103046 + ... + 223391.

It is an arithmetic number, because the mean of its divisors is an integer number (2585388960).

Almost surely, 2^19642693601 is an apocalyptic number.

It is an amenable number.

19642693601 is a deficient number, since it is larger than the sum of its proper divisors (1040418079).

19642693601 is a wasteful number, since it uses less digits than its factorization.

19642693601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 329623.

The product of its (nonzero) digits is 419904, while the sum is 47.

The spelling of 19642693601 in words is "nineteen billion, six hundred forty-two million, six hundred ninety-three thousand, six hundred one".