22206400402 has 8 divisors (see below), whose sum is σ = 34122030012. Its totient is φ = 10832390400.

The previous prime is 22206400393. The next prime is 22206400421. The reversal of 22206400402 is 20400460222.

It can be written as a sum of positive squares in 2 ways, for example, as 15111539041 + 7094861361 = 122929^2 + 84231^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 135404799 + ... + 135404962.

Almost surely, 2^22206400402 is an apocalyptic number.

22206400402 is a deficient number, since it is larger than the sum of its proper divisors (11915629610).

22206400402 is a wasteful number, since it uses less digits than its factorization.

22206400402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 270809804.

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

Adding to 22206400402 its reverse (20400460222), we get a palindrome (42606860624).

The spelling of 22206400402 in words is "twenty-two billion, two hundred six million, four hundred thousand, four hundred two".