23420311 has 4 divisors (see below), whose sum is σ = 23599224. Its totient is φ = 23241400.

The previous prime is 23420281. The next prime is 23420323. The reversal of 23420311 is 11302432.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 23420311 - 2¹⁷ = 23289239 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23420351) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 89260 + ... + 89521.

It is an arithmetic number, because the mean of its divisors is an integer number (5899806).

Almost surely, 2^23420311 is an apocalyptic number.

23420311 is a deficient number, since it is larger than the sum of its proper divisors (178913).

23420311 is a wasteful number, since it uses less digits than its factorization.

23420311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178912.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 23420311 is about 4839.4535848585. The cubic root of 23420311 is about 286.1085826639.

Adding to 23420311 its reverse (11302432), we get a palindrome (34722743).

The spelling of 23420311 in words is "twenty-three million, four hundred twenty thousand, three hundred eleven".