22818540 has 24 divisors (see below), whose sum is σ = 63892080. Its totient is φ = 6084928.

The previous prime is 22818503. The next prime is 22818541. The reversal of 22818540 is 4581822.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 22818498 and 22818507.

It is not an unprimeable number, because it can be changed into a prime (22818541) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 190095 + ... + 190214.

It is an arithmetic number, because the mean of its divisors is an integer number (2662170).

Almost surely, 2^22818540 is an apocalyptic number.

22818540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22818540 is an abundant number, since it is smaller than the sum of its proper divisors (41073540).

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

22818540 is a wasteful number, since it uses less digits than its factorization.

22818540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 380321 (or 380319 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 30.

The square root of 22818540 is about 4776.8755478869. The cubic root of 22818540 is about 283.6368266608.

The spelling of 22818540 in words is "twenty-two million, eight hundred eighteen thousand, five hundred forty".