23138666 has 16 divisors (see below), whose sum is σ = 36858240. Its totient is φ = 10856640.

The previous prime is 23138659. The next prime is 23138677. The reversal of 23138666 is 66683132.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13865 + ... + 15443.

It is an arithmetic number, because the mean of its divisors is an integer number (2303640).

Almost surely, 2^23138666 is an apocalyptic number.

23138666 is a deficient number, since it is larger than the sum of its proper divisors (13719574).

23138666 is a wasteful number, since it uses less digits than its factorization.

23138666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2029.

The product of its digits is 31104, while the sum is 35.

The square root of 23138666 is about 4810.2667285713. The cubic root of 23138666 is about 284.9570716095.

The spelling of 23138666 in words is "twenty-three million, one hundred thirty-eight thousand, six hundred sixty-six".