23042138 has 8 divisors (see below), whose sum is σ = 39500832. Its totient is φ = 9875196.

The previous prime is 23042137. The next prime is 23042141. The reversal of 23042138 is 83124032.

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

It is a super-2 number, since 2×23042138² = 1061880247222088, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (23042137) 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, 822920 + ... + 822947.

It is an arithmetic number, because the mean of its divisors is an integer number (4937604).

Almost surely, 2^23042138 is an apocalyptic number.

23042138 is a deficient number, since it is larger than the sum of its proper divisors (16458694).

23042138 is a wasteful number, since it uses less digits than its factorization.

23042138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1645876.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 23042138 is about 4800.2227031670. Note that the first 3 decimals coincide. The cubic root of 23042138 is about 284.5602657512.

The spelling of 23042138 in words is "twenty-three million, forty-two thousand, one hundred thirty-eight".