21373650344141 has 4 divisors (see below), whose sum is σ = 21373716455772. Its totient is φ = 21373584232512.

The previous prime is 21373650344119. The next prime is 21373650344147. The reversal of 21373650344141 is 14144305637312.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 16992285508900 + 4381364835241 = 4122170^2 + 2093171^2 .

It is a cyclic number.

It is not a de Polignac number, because 21373650344141 - 2⁶ = 21373650344077 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21373650344092 and 21373650344101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21373650344147) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32568476 + ... + 33218261.

It is an arithmetic number, because the mean of its divisors is an integer number (5343429113943).

Almost surely, 2^{21373650344141} is an apocalyptic number.

It is an amenable number.

21373650344141 is a deficient number, since it is larger than the sum of its proper divisors (66111631).

21373650344141 is an equidigital number, since it uses as much as digits as its factorization.

21373650344141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66111630.

The product of its (nonzero) digits is 725760, while the sum is 44.

The spelling of 21373650344141 in words is "twenty-one trillion, three hundred seventy-three billion, six hundred fifty million, three hundred forty-four thousand, one hundred forty-one".