23187356638 has 8 divisors (see below), whose sum is σ = 35980381080. Its totient is φ = 11193896280.

The previous prime is 23187356617. The next prime is 23187356639. The reversal of 23187356638 is 83665378132.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23187356639) 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, 199890948 + ... + 199891063.

It is an arithmetic number, because the mean of its divisors is an integer number (4497547635).

Almost surely, 2^23187356638 is an apocalyptic number.

23187356638 is a deficient number, since it is larger than the sum of its proper divisors (12793024442).

23187356638 is a wasteful number, since it uses less digits than its factorization.

23187356638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 399782042.

The product of its digits is 4354560, while the sum is 52.

The spelling of 23187356638 in words is "twenty-three billion, one hundred eighty-seven million, three hundred fifty-six thousand, six hundred thirty-eight".