19493004640975 has 24 divisors (see below), whose sum is σ = 24778666901120. Its totient is φ = 15203896737120.

The previous prime is 19493004640927. The next prime is 19493004640979. The reversal of 19493004640975 is 57904640039491.

It is a de Polignac number, because none of the positive numbers 2^k-19493004640975 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19493004640979) 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, 15986955 + ... + 17163004.

Almost surely, 2^{19493004640975} is an apocalyptic number.

19493004640975 is a deficient number, since it is larger than the sum of its proper divisors (5285662260145).

19493004640975 is a wasteful number, since it uses less digits than its factorization.

19493004640975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33150559 (or 33150554 counting only the distinct ones).

The product of its (nonzero) digits is 29393280, while the sum is 61.

The spelling of 19493004640975 in words is "nineteen trillion, four hundred ninety-three billion, four million, six hundred forty thousand, nine hundred seventy-five".