22424402421 has 16 divisors (see below), whose sum is σ = 33234321600. Its totient is φ = 14943758544.

The previous prime is 22424402419. The next prime is 22424402431. The reversal of 22424402421 is 12420442422.

It is not a de Polignac number, because 22424402421 - 2¹ = 22424402419 is a prime.

It is a super-2 number, since 2×22424402421² (a number of 22 digits) contains 22 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22424402411) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 91386 + ... + 230651.

It is an arithmetic number, because the mean of its divisors is an integer number (2077145100).

Almost surely, 2^22424402421 is an apocalyptic number.

It is an amenable number.

22424402421 is a deficient number, since it is larger than the sum of its proper divisors (10809919179).

22424402421 is a wasteful number, since it uses less digits than its factorization.

22424402421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 324625 (or 324619 counting only the distinct ones).

The product of its (nonzero) digits is 8192, while the sum is 27.

Adding to 22424402421 its reverse (12420442422), we get a palindrome (34844844843).

The spelling of 22424402421 in words is "twenty-two billion, four hundred twenty-four million, four hundred two thousand, four hundred twenty-one".