23658343538 has 4 divisors (see below), whose sum is σ = 35487515310. Its totient is φ = 11829171768.

The previous prime is 23658343531. The next prime is 23658343549. The reversal of 23658343538 is 83534385632.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 23441753449 + 216590089 = 153107^2 + 14717^2 .

It is not an unprimeable number, because it can be changed into a prime (23658343531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5914585883 + ... + 5914585886.

Almost surely, 2^23658343538 is an apocalyptic number.

23658343538 is a deficient number, since it is larger than the sum of its proper divisors (11829171772).

23658343538 is a wasteful number, since it uses less digits than its factorization.

23658343538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11829171771.

The product of its digits is 6220800, while the sum is 50.

The spelling of 23658343538 in words is "twenty-three billion, six hundred fifty-eight million, three hundred forty-three thousand, five hundred thirty-eight".