22663540 has 12 divisors (see below), whose sum is σ = 47593476. Its totient is φ = 9065408.

The previous prime is 22663517. The next prime is 22663547. The reversal of 22663540 is 4536622.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 4104676 + 18558864 = 2026^2 + 4308^2 .

It is a junction number, because it is equal to n+sod(n) for n = 22663499 and 22663508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22663547) 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, 566569 + ... + 566608.

It is an arithmetic number, because the mean of its divisors is an integer number (3966123).

Almost surely, 2^22663540 is an apocalyptic number.

22663540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22663540 is an abundant number, since it is smaller than the sum of its proper divisors (24929936).

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

22663540 is a wasteful number, since it uses less digits than its factorization.

22663540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1133186 (or 1133184 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 28.

The square root of 22663540 is about 4760.6239086910. The cubic root of 22663540 is about 282.9931449600.

The spelling of 22663540 in words is "twenty-two million, six hundred sixty-three thousand, five hundred forty".