23021305 has 16 divisors (see below), whose sum is σ = 28433664. Its totient is φ = 17884800.

The previous prime is 23021291. The next prime is 23021333. The reversal of 23021305 is 50312032.

It is not a de Polignac number, because 23021305 - 2⁷ = 23021177 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38005 + ... + 38605.

It is an arithmetic number, because the mean of its divisors is an integer number (1777104).

Almost surely, 2^23021305 is an apocalyptic number.

It is an amenable number.

23021305 is a deficient number, since it is larger than the sum of its proper divisors (5412359).

23021305 is a wasteful number, since it uses less digits than its factorization.

23021305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 816.

The product of its (nonzero) digits is 180, while the sum is 16.

The square root of 23021305 is about 4798.0522089698. The cubic root of 23021305 is about 284.4744804312.

Adding to 23021305 its reverse (50312032), we get a palindrome (73333337).

The spelling of 23021305 in words is "twenty-three million, twenty-one thousand, three hundred five".