21470546669029 has 2 divisors, whose sum is σ = 21470546669030. Its totient is φ = 21470546669028.

The previous prime is 21470546669023. The next prime is 21470546669051. The reversal of 21470546669029 is 92096664507412.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17933615736100 + 3536930932929 = 4234810^2 + 1880673^2 .

It is a cyclic number.

It is not a de Polignac number, because 21470546669029 - 2³ = 21470546669021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21470546669021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10735273334514 + 10735273334515.

It is an arithmetic number, because the mean of its divisors is an integer number (10735273334515).

Almost surely, 2^{21470546669029} is an apocalyptic number.

It is an amenable number.

21470546669029 is a deficient number, since it is larger than the sum of its proper divisors (1).

21470546669029 is an equidigital number, since it uses as much as digits as its factorization.

21470546669029 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 39191040, while the sum is 61.

The spelling of 21470546669029 in words is "twenty-one trillion, four hundred seventy billion, five hundred forty-six million, six hundred sixty-nine thousand, twenty-nine".