22011242004 has 18 divisors (see below), whose sum is σ = 55639528490. Its totient is φ = 7337080656.

The previous prime is 22011241949. The next prime is 22011242017. The reversal of 22011242004 is 40024211022.

It can be written as a sum of positive squares in only one way, i.e., 18722448900 + 3288793104 = 136830^2 + 57348^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 305711659 + ... + 305711730.

Almost surely, 2^22011242004 is an apocalyptic number.

It is an amenable number.

22011242004 is an abundant number, since it is smaller than the sum of its proper divisors (33628286486).

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

22011242004 is a wasteful number, since it uses less digits than its factorization.

22011242004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 611423399 (or 611423394 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 22011242004 its reverse (40024211022), we get a palindrome (62035453026).

The spelling of 22011242004 in words is "twenty-two billion, eleven million, two hundred forty-two thousand, four".