22755454821 has 24 divisors (see below), whose sum is σ = 37185124704. Its totient is φ = 13791183120.

The previous prime is 22755454819. The next prime is 22755454847. The reversal of 22755454821 is 12845455722.

22755454821 is a `hidden beast` number, since 2 + 27 + 5 + 545 + 4 + 82 + 1 = 666.

It is not a de Polignac number, because 22755454821 - 2¹ = 22755454819 is a prime.

It is a super-2 number, since 2×22755454821² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22755454801) 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, 4253866 + ... + 4259211.

It is an arithmetic number, because the mean of its divisors is an integer number (1549380196).

Almost surely, 2^22755454821 is an apocalyptic number.

It is an amenable number.

22755454821 is a deficient number, since it is larger than the sum of its proper divisors (14429669883).

22755454821 is an equidigital number, since it uses as much as digits as its factorization.

22755454821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8513103 (or 8513091 counting only the distinct ones).

The product of its digits is 896000, while the sum is 45.

Subtracting from 22755454821 its reverse (12845455722), we obtain a palindrome (9909999099).

The spelling of 22755454821 in words is "twenty-two billion, seven hundred fifty-five million, four hundred fifty-four thousand, eight hundred twenty-one".