22404043021 has 24 divisors (see below), whose sum is σ = 24783166080. Its totient is φ = 20211691104.

The previous prime is 22404043009. The next prime is 22404043033. The reversal of 22404043021 is 12034040422.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (22404043009) and next prime (22404043033).

It is not a de Polignac number, because 22404043021 - 2⁵ = 22404042989 is a prime.

It is a super-2 number, since 2×22404043021² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 22404042983 and 22404043001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22404043001) 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, 1895496 + ... + 1907278.

It is an arithmetic number, because the mean of its divisors is an integer number (1032631920).

Almost surely, 2^22404043021 is an apocalyptic number.

It is an amenable number.

22404043021 is a deficient number, since it is larger than the sum of its proper divisors (2379123059).

22404043021 is a wasteful number, since it uses less digits than its factorization.

22404043021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12073 (or 12054 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 22.

Adding to 22404043021 its reverse (12034040422), we get a palindrome (34438083443).

The spelling of 22404043021 in words is "twenty-two billion, four hundred four million, forty-three thousand, twenty-one".