23173749494 has 16 divisors (see below), whose sum is σ = 41817292800. Its totient is φ = 9408890664.

The previous prime is 23173749491. The next prime is 23173749503. The reversal of 23173749494 is 49494737132.

It is a happy number.

It is a super-2 number, since 2×23173749494² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23173749491) 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, 43559414 + ... + 43559945.

It is an arithmetic number, because the mean of its divisors is an integer number (2613580800).

Almost surely, 2^23173749494 is an apocalyptic number.

23173749494 is a deficient number, since it is larger than the sum of its proper divisors (18643543306).

23173749494 is a wasteful number, since it uses less digits than its factorization.

23173749494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87119387.

The product of its digits is 4572288, while the sum is 53.

The spelling of 23173749494 in words is "twenty-three billion, one hundred seventy-three million, seven hundred forty-nine thousand, four hundred ninety-four".