23181811642 has 16 divisors (see below), whose sum is σ = 39583173312. Its totient is φ = 10079048320.

The previous prime is 23181811637. The next prime is 23181811661. The reversal of 23181811642 is 24611818132.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22906423 + ... + 22907434.

It is an arithmetic number, because the mean of its divisors is an integer number (2473948332).

Almost surely, 2^23181811642 is an apocalyptic number.

23181811642 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

23181811642 is a deficient number, since it is larger than the sum of its proper divisors (16401361670).

23181811642 is a wasteful number, since it uses less digits than its factorization.

23181811642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45813893.

The product of its digits is 18432, while the sum is 37.

The spelling of 23181811642 in words is "twenty-three billion, one hundred eighty-one million, eight hundred eleven thousand, six hundred forty-two".