22002400424 has 8 divisors (see below), whose sum is σ = 41254500810. Its totient is φ = 11001200208.

The previous prime is 22002400423. The next prime is 22002400439. The reversal of 22002400424 is 42400420022.

It can be written as a sum of positive squares in only one way, i.e., 22001788900 + 611524 = 148330^2 + 782^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 22002400396 and 22002400405.

It is not an unprimeable number, because it can be changed into a prime (22002400423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1375150019 + ... + 1375150034.

Almost surely, 2^22002400424 is an apocalyptic number.

It is an amenable number.

22002400424 is a deficient number, since it is larger than the sum of its proper divisors (19252100386).

22002400424 is a wasteful number, since it uses less digits than its factorization.

22002400424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2750300059 (or 2750300055 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 20.

Adding to 22002400424 its reverse (42400420022), we get a palindrome (64402820446).

The spelling of 22002400424 in words is "twenty-two billion, two million, four hundred thousand, four hundred twenty-four".