23121633 has 16 divisors (see below), whose sum is σ = 32144960. Its totient is φ = 14769216.

The previous prime is 23121617. The next prime is 23121643. The reversal of 23121633 is 33612132.

It is not a de Polignac number, because 23121633 - 2⁴ = 23121617 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23121643) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5883 + ... + 8991.

It is an arithmetic number, because the mean of its divisors is an integer number (2009060).

Almost surely, 2^23121633 is an apocalyptic number.

It is an amenable number.

23121633 is a deficient number, since it is larger than the sum of its proper divisors (9023327).

23121633 is a wasteful number, since it uses less digits than its factorization.

23121633 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3216.

The product of its digits is 648, while the sum is 21.

The square root of 23121633 is about 4808.4959186839. The cubic root of 23121633 is about 284.8871329008.

Adding to 23121633 its reverse (33612132), we get a palindrome (56733765).

The spelling of 23121633 in words is "twenty-three million, one hundred twenty-one thousand, six hundred thirty-three".