22156220426 has 8 divisors (see below), whose sum is σ = 33239778564. Its totient is φ = 11076294240.

The previous prime is 22156220369. The next prime is 22156220477. The reversal of 22156220426 is 62402265122.

It can be written as a sum of positive squares in 2 ways, for example, as 21083330401 + 1072890025 = 145201^2 + 32755^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 22156220392 and 22156220401.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 892685 + ... + 917168.

Almost surely, 2^22156220426 is an apocalyptic number.

22156220426 is a deficient number, since it is larger than the sum of its proper divisors (11083558138).

22156220426 is a wasteful number, since it uses less digits than its factorization.

22156220426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1815976.

The product of its (nonzero) digits is 23040, while the sum is 32.

Adding to 22156220426 its reverse (62402265122), we get a palindrome (84558485548).

The spelling of 22156220426 in words is "twenty-two billion, one hundred fifty-six million, two hundred twenty thousand, four hundred twenty-six".