22761018 has 48 divisors (see below), whose sum is σ = 57685056. Its totient is φ = 6350400.

The previous prime is 22761017. The next prime is 22761041. The reversal of 22761018 is 81016722.

It is a junction number, because it is equal to n+sod(n) for n = 22760982 and 22761000.

It is not an unprimeable number, because it can be changed into a prime (22761017) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3318 + ... + 7518.

It is an arithmetic number, because the mean of its divisors is an integer number (1201772).

Almost surely, 2^22761018 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22761018, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28842528).

22761018 is an abundant number, since it is smaller than the sum of its proper divisors (34924038).

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

22761018 is a wasteful number, since it uses less digits than its factorization.

22761018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4259 (or 4256 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 27.

The square root of 22761018 is about 4770.8508675078. The cubic root of 22761018 is about 283.3982912963.

The spelling of 22761018 in words is "twenty-two million, seven hundred sixty-one thousand, eighteen".