21442023394244 has 6 divisors (see below), whose sum is σ = 37523540939934. Its totient is φ = 10721011697120.

The previous prime is 21442023394241. The next prime is 21442023394357. The reversal of 21442023394244 is 44249332024412.

It can be written as a sum of positive squares in only one way, i.e., 16007296831744 + 5434726562500 = 4000912^2 + 2331250^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21442023394195 and 21442023394204.

It is not an unprimeable number, because it can be changed into a prime (21442023394241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2680252924277 + ... + 2680252924284.

It is an arithmetic number, because the mean of its divisors is an integer number (6253923489989).

Almost surely, 2^{21442023394244} is an apocalyptic number.

It is an amenable number.

21442023394244 is a deficient number, since it is larger than the sum of its proper divisors (16081517545690).

21442023394244 is a wasteful number, since it uses less digits than its factorization.

21442023394244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5360505848565 (or 5360505848563 counting only the distinct ones).

The product of its (nonzero) digits is 1327104, while the sum is 44.

The spelling of 21442023394244 in words is "twenty-one trillion, four hundred forty-two billion, twenty-three million, three hundred ninety-four thousand, two hundred forty-four".