21244504422 has 16 divisors (see below), whose sum is σ = 43954147440. Its totient is φ = 6837311712.

The previous prime is 21244504361. The next prime is 21244504439. The reversal of 21244504422 is 22440544212.

It is a self number, because there is not a number n which added to its sum of digits gives 21244504422.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 61047253 + ... + 61047600.

It is an arithmetic number, because the mean of its divisors is an integer number (2747134215).

Almost surely, 2^21244504422 is an apocalyptic number.

21244504422 is an abundant number, since it is smaller than the sum of its proper divisors (22709643018).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21244504422 is a wasteful number, since it uses less digits than its factorization.

21244504422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122094887.

The product of its (nonzero) digits is 20480, while the sum is 30.

The spelling of 21244504422 in words is "twenty-one billion, two hundred forty-four million, five hundred four thousand, four hundred twenty-two".