23321340 has 144 divisors (see below), whose sum is σ = 82188288. Its totient is φ = 5242752.

The previous prime is 23321339. The next prime is 23321377. The reversal of 23321340 is 4312332.

23321340 is a `hidden beast` number, since 2 + 3 + 321 + 340 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 104469 + ... + 104691.

It is an arithmetic number, because the mean of its divisors is an integer number (570752).

Almost surely, 2^23321340 is an apocalyptic number.

23321340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23321340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41094144).

23321340 is an abundant number, since it is smaller than the sum of its proper divisors (58866948).

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

23321340 is a wasteful number, since it uses less digits than its factorization.

23321340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 328 (or 323 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 18.

The square root of 23321340 is about 4829.2173278907. The cubic root of 23321340 is about 285.7049951741.

Adding to 23321340 its reverse (4312332), we get a palindrome (27633672).

The spelling of 23321340 in words is "twenty-three million, three hundred twenty-one thousand, three hundred forty".