22051260018 has 42 divisors (see below), whose sum is σ = 49605403869. Its totient is φ = 7348529952.

The previous prime is 22051259953. The next prime is 22051260067. The reversal of 22051260018 is 81006215022.

It is a happy number.

22051260018 is a `hidden beast` number, since 2 + 2 + 0 + 51 + 2 + 600 + 1 + 8 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 20873603529 + 1177656489 = 144477^2 + 34317^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=105003.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 22051259973 and 22051260000.

It is an unprimeable number.

It is a polite number, since it can be written in 20 ways as a sum of consecutive naturals, for example, 5668218 + ... + 5672106.

Almost surely, 2^22051260018 is an apocalyptic number.

22051260018 is an abundant number, since it is smaller than the sum of its proper divisors (27554143851).

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

22051260018 is an frugal number, since it uses more digits than its factorization.

22051260018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7798 (or 3894 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The spelling of 22051260018 in words is "twenty-two billion, fifty-one million, two hundred sixty thousand, eighteen".