22818740 has 48 divisors (see below), whose sum is σ = 55036800. Its totient is φ = 7784832.

The previous prime is 22818727. The next prime is 22818749. The reversal of 22818740 is 4781822.

It is a junction number, because it is equal to n+sod(n) for n = 22818697 and 22818706.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22818749) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 54251 + ... + 54669.

It is an arithmetic number, because the mean of its divisors is an integer number (1146600).

Almost surely, 2^22818740 is an apocalyptic number.

22818740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22818740 is an abundant number, since it is smaller than the sum of its proper divisors (32218060).

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

22818740 is a wasteful number, since it uses less digits than its factorization.

22818740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 824 (or 822 counting only the distinct ones).

The product of its (nonzero) digits is 7168, while the sum is 32.

The square root of 22818740 is about 4776.8964820268. The cubic root of 22818740 is about 283.6376553320.

The spelling of 22818740 in words is "twenty-two million, eight hundred eighteen thousand, seven hundred forty".