22123355544 has 24 divisors (see below), whose sum is σ = 59917421460. Its totient is φ = 7374451824.

The previous prime is 22123355497. The next prime is 22123355549. The reversal of 22123355544 is 44555332122.

22123355544 is a `hidden beast` number, since 22 + 12 + 33 + 55 + 544 = 666.

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 22123355499 and 22123355508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22123355549) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 153634342 + ... + 153634485.

Almost surely, 2^22123355544 is an apocalyptic number.

22123355544 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

22123355544 is an abundant number, since it is smaller than the sum of its proper divisors (37794065916).

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

22123355544 is a wasteful number, since it uses less digits than its factorization.

22123355544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 307268839 (or 307268832 counting only the distinct ones).

The product of its digits is 144000, while the sum is 36.

Adding to 22123355544 its reverse (44555332122), we get a palindrome (66678687666).

The spelling of 22123355544 in words is "twenty-two billion, one hundred twenty-three million, three hundred fifty-five thousand, five hundred forty-four".