21702344294429 has 2 divisors, whose sum is σ = 21702344294430. Its totient is φ = 21702344294428.

The previous prime is 21702344294303. The next prime is 21702344294447. The reversal of 21702344294429 is 92449244320712.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14212259107225 + 7490085187204 = 3769915^2 + 2736802^2 .

It is a cyclic number.

It is not a de Polignac number, because 21702344294429 - 2³² = 21698049327133 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21702344294459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10851172147214 + 10851172147215.

It is an arithmetic number, because the mean of its divisors is an integer number (10851172147215).

Almost surely, 2^{21702344294429} is an apocalyptic number.

It is an amenable number.

21702344294429 is a deficient number, since it is larger than the sum of its proper divisors (1).

21702344294429 is an equidigital number, since it uses as much as digits as its factorization.

21702344294429 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6967296, while the sum is 53.

The spelling of 21702344294429 in words is "twenty-one trillion, seven hundred two billion, three hundred forty-four million, two hundred ninety-four thousand, four hundred twenty-nine".