21430004199997 has 2 divisors, whose sum is σ = 21430004199998. Its totient is φ = 21430004199996.

The previous prime is 21430004199959. The next prime is 21430004200027. The reversal of 21430004199997 is 79999140003412.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17925223324761 + 3504780875236 = 4233819^2 + 1872106^2 .

It is a cyclic number.

It is not a de Polignac number, because 21430004199997 - 2⁷ = 21430004199869 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21430004499997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10715002099998 + 10715002099999.

It is an arithmetic number, because the mean of its divisors is an integer number (10715002099999).

Almost surely, 2^{21430004199997} is an apocalyptic number.

It is an amenable number.

21430004199997 is a deficient number, since it is larger than the sum of its proper divisors (1).

21430004199997 is an equidigital number, since it uses as much as digits as its factorization.

21430004199997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4408992, while the sum is 58.

The spelling of 21430004199997 in words is "twenty-one trillion, four hundred thirty billion, four million, one hundred ninety-nine thousand, nine hundred ninety-seven".