21702344294401 has 4 divisors (see below), whose sum is σ = 21702364258372. Its totient is φ = 21702324330432.

The previous prime is 21702344294303. The next prime is 21702344294429. The reversal of 21702344294401 is 10449244320712.

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 17214831653776 + 4487512640625 = 4149076^2 + 2118375^2 .

It is a cyclic number.

It is not a de Polignac number, because 21702344294401 - 2¹⁷ = 21702344163329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21702344294101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8251356 + ... + 10558861.

It is an arithmetic number, because the mean of its divisors is an integer number (5425591064593).

Almost surely, 2^{21702344294401} is an apocalyptic number.

It is an amenable number.

21702344294401 is a deficient number, since it is larger than the sum of its proper divisors (19963971).

21702344294401 is a wasteful number, since it uses less digits than its factorization.

21702344294401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19963970.

The product of its (nonzero) digits is 387072, while the sum is 43.

The spelling of 21702344294401 in words is "twenty-one trillion, seven hundred two billion, three hundred forty-four million, two hundred ninety-four thousand, four hundred one".