23542138 has 8 divisors (see below), whose sum is σ = 36267732. Its totient is φ = 11452896.

The previous prime is 23542111. The next prime is 23542139. The reversal of 23542138 is 83124532.

It can be written as a sum of positive squares in 2 ways, for example, as 20729809 + 2812329 = 4553^2 + 1677^2 .

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

It is a super-2 number, since 2×23542138² = 1108464523222088, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (23542139) 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, 158995 + ... + 159142.

Almost surely, 2^23542138 is an apocalyptic number.

23542138 is a deficient number, since it is larger than the sum of its proper divisors (12725594).

23542138 is a wasteful number, since it uses less digits than its factorization.

23542138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 318176.

The product of its digits is 5760, while the sum is 28.

The square root of 23542138 is about 4852.0241137076. The cubic root of 23542138 is about 286.6038150171.

The spelling of 23542138 in words is "twenty-three million, five hundred forty-two thousand, one hundred thirty-eight".