21944300169 has 16 divisors (see below), whose sum is σ = 32459984640. Its totient is φ = 13074158160.

The previous prime is 21944300159. The next prime is 21944300171. The reversal of 21944300169 is 96100344912.

It is not a de Polignac number, because 21944300169 - 2⁵ = 21944300137 is a prime.

It is a super-2 number, since 2×21944300169² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21944300159) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5633467 + ... + 5637360.

It is an arithmetic number, because the mean of its divisors is an integer number (2028749040).

Almost surely, 2^21944300169 is an apocalyptic number.

It is an amenable number.

21944300169 is a deficient number, since it is larger than the sum of its proper divisors (10515684471).

21944300169 is a wasteful number, since it uses less digits than its factorization.

21944300169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11270900.

The product of its (nonzero) digits is 46656, while the sum is 39.

The spelling of 21944300169 in words is "twenty-one billion, nine hundred forty-four million, three hundred thousand, one hundred sixty-nine".