22061262240 has 144 divisors (see below), whose sum is σ = 75341939400. Its totient is φ = 5878480896.

The previous prime is 22061262211. The next prime is 22061262259. The reversal of 22061262240 is 4226216022.

It is a happy number.

22061262240 is a `hidden beast` number, since 2 + 2 + 0 + 612 + 6 + 2 + 2 + 40 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 18849093264 + 3212168976 = 137292^2 + 56676^2 .

It is a tau number, because it is divible by the number of its divisors (144).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2139016 + ... + 2149304.

Almost surely, 2^22061262240 is an apocalyptic number.

22061262240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22061262240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37670969700).

22061262240 is an abundant number, since it is smaller than the sum of its proper divisors (53280677160).

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

22061262240 is a wasteful number, since it uses less digits than its factorization.

22061262240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11799 (or 11788 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

Adding to 22061262240 its reverse (4226216022), we get a palindrome (26287478262).

The spelling of 22061262240 in words is "twenty-two billion, sixty-one million, two hundred sixty-two thousand, two hundred forty".