21438844365301 has 16 divisors (see below), whose sum is σ = 23514168901248. Its totient is φ = 19384620595200.

The previous prime is 21438844365299. The next prime is 21438844365313. The reversal of 21438844365301 is 10356344883412.

It is a cyclic number.

It is not a de Polignac number, because 21438844365301 - 2¹ = 21438844365299 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21438844365391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8590161 + ... + 10801321.

It is an arithmetic number, because the mean of its divisors is an integer number (1469635556328).

Almost surely, 2^{21438844365301} is an apocalyptic number.

It is an amenable number.

21438844365301 is a deficient number, since it is larger than the sum of its proper divisors (2075324535947).

21438844365301 is a wasteful number, since it uses less digits than its factorization.

21438844365301 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2215932.

The product of its (nonzero) digits is 6635520, while the sum is 52.

The spelling of 21438844365301 in words is "twenty-one trillion, four hundred thirty-eight billion, eight hundred forty-four million, three hundred sixty-five thousand, three hundred one".