23201638 has 4 divisors (see below), whose sum is σ = 34802460. Its totient is φ = 11600818.

The previous prime is 23201623. The next prime is 23201657. The reversal of 23201638 is 83610232.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5800408 + ... + 5800411.

It is an arithmetic number, because the mean of its divisors is an integer number (8700615).

Almost surely, 2^23201638 is an apocalyptic number.

23201638 is a deficient number, since it is larger than the sum of its proper divisors (11600822).

23201638 is a wasteful number, since it uses less digits than its factorization.

23201638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11600821.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 23201638 is about 4816.8078641357. The cubic root of 23201638 is about 285.2153415081.

The spelling of 23201638 in words is "twenty-three million, two hundred one thousand, six hundred thirty-eight".