23351638 has 4 divisors (see below), whose sum is σ = 35027460. Its totient is φ = 11675818.

The previous prime is 23351611. The next prime is 23351639. The reversal of 23351638 is 83615332.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23351639) by changing a digit.

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, 5837908 + ... + 5837911.

It is an arithmetic number, because the mean of its divisors is an integer number (8756865).

Almost surely, 2^23351638 is an apocalyptic number.

23351638 is a deficient number, since it is larger than the sum of its proper divisors (11675822).

23351638 is a wasteful number, since it uses less digits than its factorization.

23351638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11675821.

The product of its digits is 12960, while the sum is 31.

The square root of 23351638 is about 4832.3532569546. The cubic root of 23351638 is about 285.8286665130.

The spelling of 23351638 in words is "twenty-three million, three hundred fifty-one thousand, six hundred thirty-eight".