23012140 has 24 divisors (see below), whose sum is σ = 49355712. Its totient is φ = 9008640.

The previous prime is 23012117. The next prime is 23012149. The reversal of 23012140 is 4121032.

It is a self number, because there is not a number n which added to its sum of digits gives 23012140.

It is not an unprimeable number, because it can be changed into a prime (23012149) 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, 11301 + ... + 13180.

It is an arithmetic number, because the mean of its divisors is an integer number (2056488).

Almost surely, 2^23012140 is an apocalyptic number.

23012140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23012140 is an abundant number, since it is smaller than the sum of its proper divisors (26343572).

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

23012140 is a wasteful number, since it uses less digits than its factorization.

23012140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24537 (or 24535 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 23012140 is about 4797.0970388350. The cubic root of 23012140 is about 284.4367247570.

Adding to 23012140 its reverse (4121032), we get a palindrome (27133172).

The spelling of 23012140 in words is "twenty-three million, twelve thousand, one hundred forty".