22713540 has 24 divisors (see below), whose sum is σ = 63598080. Its totient is φ = 6056928.

The previous prime is 22713499. The next prime is 22713541. The reversal of 22713540 is 4531722.

It is a self number, because there is not a number n which added to its sum of digits gives 22713540.

It is not an unprimeable number, because it can be changed into a prime (22713541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 189220 + ... + 189339.

It is an arithmetic number, because the mean of its divisors is an integer number (2649920).

Almost surely, 2^22713540 is an apocalyptic number.

22713540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22713540 is an abundant number, since it is smaller than the sum of its proper divisors (40884540).

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

22713540 is a wasteful number, since it uses less digits than its factorization.

22713540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 378571 (or 378569 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 24.

The square root of 22713540 is about 4765.8724280031. The cubic root of 22713540 is about 283.2011040048.

The spelling of 22713540 in words is "twenty-two million, seven hundred thirteen thousand, five hundred forty".