23321140 has 12 divisors (see below), whose sum is σ = 48974436. Its totient is φ = 9328448.

The previous prime is 23321119. The next prime is 23321141. The reversal of 23321140 is 4112332.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 16990884 + 6330256 = 4122^2 + 2516^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23321141) 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 3 ways as a sum of consecutive naturals, for example, 583009 + ... + 583048.

It is an arithmetic number, because the mean of its divisors is an integer number (4081203).

Almost surely, 2^23321140 is an apocalyptic number.

23321140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23321140 is an abundant number, since it is smaller than the sum of its proper divisors (25653296).

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

23321140 is a wasteful number, since it uses less digits than its factorization.

23321140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1166066 (or 1166064 counting only the distinct ones).

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

The square root of 23321140 is about 4829.1966205571. The cubic root of 23321140 is about 285.7041784520.

Adding to 23321140 its reverse (4112332), we get a palindrome (27433472).

The spelling of 23321140 in words is "twenty-three million, three hundred twenty-one thousand, one hundred forty".