23018340 has 48 divisors (see below), whose sum is σ = 68245632. Its totient is φ = 5776896.

The previous prime is 23018327. The next prime is 23018341. The reversal of 23018340 is 4381032.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23018341) 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, 10264 + ... + 12303.

It is an arithmetic number, because the mean of its divisors is an integer number (1421784).

Almost surely, 2^23018340 is an apocalyptic number.

23018340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23018340 is an abundant number, since it is smaller than the sum of its proper divisors (45227292).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

23018340 is a wasteful number, since it uses less digits than its factorization.

23018340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22596 (or 22594 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 23018340 is about 4797.7432194731. The cubic root of 23018340 is about 284.4622670627.

Adding to 23018340 its reverse (4381032), we get a palindrome (27399372).

The spelling of 23018340 in words is "twenty-three million, eighteen thousand, three hundred forty".