23321040 has 40 divisors (see below), whose sum is σ = 72295968. Its totient is φ = 6218880.

The previous prime is 23320987. The next prime is 23321041. The reversal of 23321040 is 4012332.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23321041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48346 + ... + 48825.

Almost surely, 2^23321040 is an apocalyptic number.

23321040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23321040 is an abundant number, since it is smaller than the sum of its proper divisors (48974928).

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

23321040 is a wasteful number, since it uses less digits than its factorization.

23321040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97187 (or 97181 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 23321040 is about 4829.1862668570. The cubic root of 23321040 is about 285.7037700892.

Adding to 23321040 its reverse (4012332), we get a palindrome (27333372).

The spelling of 23321040 in words is "twenty-three million, three hundred twenty-one thousand, forty".