21430714841 has 2 divisors, whose sum is σ = 21430714842. Its totient is φ = 21430714840.

The previous prime is 21430714829. The next prime is 21430714847. The reversal of 21430714841 is 14841703412.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17643543241 + 3787171600 = 132829^2 + 61540^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21430714841 is a prime.

It is not a weakly prime, because it can be changed into another prime (21430714847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10715357420 + 10715357421.

It is an arithmetic number, because the mean of its divisors is an integer number (10715357421).

Almost surely, 2^21430714841 is an apocalyptic number.

It is an amenable number.

21430714841 is a deficient number, since it is larger than the sum of its proper divisors (1).

21430714841 is an equidigital number, since it uses as much as digits as its factorization.

21430714841 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21504, while the sum is 35.

The spelling of 21430714841 in words is "twenty-one billion, four hundred thirty million, seven hundred fourteen thousand, eight hundred forty-one".