21844196245 has 8 divisors (see below), whose sum is σ = 26572118616. Its totient is φ = 17235968256.

The previous prime is 21844196243. The next prime is 21844196267. The reversal of 21844196245 is 54269144812.

It can be written as a sum of positive squares in 4 ways, for example, as 3862995409 + 17981200836 = 62153^2 + 134094^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21844196245 - 2¹ = 21844196243 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21844196195 and 21844196204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21844196243) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29923192 + ... + 29923921.

It is an arithmetic number, because the mean of its divisors is an integer number (3321514827).

Almost surely, 2^21844196245 is an apocalyptic number.

It is an amenable number.

21844196245 is a deficient number, since it is larger than the sum of its proper divisors (4727922371).

21844196245 is an equidigital number, since it uses as much as digits as its factorization.

21844196245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59847191.

The product of its digits is 552960, while the sum is 46.

It can be divided in two parts, 21844 and 196245, that added together give a square (218089 = 467²).

The spelling of 21844196245 in words is "twenty-one billion, eight hundred forty-four million, one hundred ninety-six thousand, two hundred forty-five".