21422244370 has 32 divisors (see below), whose sum is σ = 39323484720. Its totient is φ = 8399539200.

The previous prime is 21422244359. The next prime is 21422244377. The reversal of 21422244370 is 7344222412.

It can be written as a sum of positive squares in 8 ways, for example, as 3460615929 + 17961628441 = 58827^2 + 134021^2 .

It is not an unprimeable number, because it can be changed into a prime (21422244377) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 580470 + ... + 616270.

Almost surely, 2^21422244370 is an apocalyptic number.

21422244370 is a deficient number, since it is larger than the sum of its proper divisors (17901240350).

21422244370 is a wasteful number, since it uses less digits than its factorization.

21422244370 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36990.

The product of its (nonzero) digits is 21504, while the sum is 31.

Adding to 21422244370 its reverse (7344222412), we get a palindrome (28766466782).

The spelling of 21422244370 in words is "twenty-one billion, four hundred twenty-two million, two hundred forty-four thousand, three hundred seventy".