21944267445 has 16 divisors (see below), whose sum is σ = 36243436032. Its totient is φ = 11326073280.

The previous prime is 21944267407. The next prime is 21944267447. The reversal of 21944267445 is 54476244912.

It is a de Polignac number, because none of the positive numbers 2^k-21944267445 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21944267394 and 21944267403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21944267447) 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, 23595522 + ... + 23596451.

It is an arithmetic number, because the mean of its divisors is an integer number (2265214752).

Almost surely, 2^21944267445 is an apocalyptic number.

It is an amenable number.

21944267445 is a deficient number, since it is larger than the sum of its proper divisors (14299168587).

21944267445 is a wasteful number, since it uses less digits than its factorization.

21944267445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47192012.

The product of its digits is 1935360, while the sum is 48.

The spelling of 21944267445 in words is "twenty-one billion, nine hundred forty-four million, two hundred sixty-seven thousand, four hundred forty-five".