21440202022 has 4 divisors (see below), whose sum is σ = 32160303036. Its totient is φ = 10720101010.

The previous prime is 21440201987. The next prime is 21440202029. The reversal of 21440202022 is 22020204412.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21440202029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5360050504 + ... + 5360050507.

It is an arithmetic number, because the mean of its divisors is an integer number (8040075759).

Almost surely, 2^21440202022 is an apocalyptic number.

21440202022 is a deficient number, since it is larger than the sum of its proper divisors (10720101014).

21440202022 is a wasteful number, since it uses less digits than its factorization.

21440202022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10720101013.

The product of its (nonzero) digits is 512, while the sum is 19.

Adding to 21440202022 its reverse (22020204412), we get a palindrome (43460406434).

The spelling of 21440202022 in words is "twenty-one billion, four hundred forty million, two hundred two thousand, twenty-two".