16470642421 has 2 divisors, whose sum is σ = 16470642422. Its totient is φ = 16470642420.

The previous prime is 16470642413. The next prime is 16470642439. The reversal of 16470642421 is 12424607461.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15398079921 + 1072562500 = 124089^2 + 32750^2 .

It is a cyclic number.

It is not a de Polignac number, because 16470642421 - 2³ = 16470642413 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16470648421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8235321210 + 8235321211.

It is an arithmetic number, because the mean of its divisors is an integer number (8235321211).

Almost surely, 2^16470642421 is an apocalyptic number.

It is an amenable number.

16470642421 is a deficient number, since it is larger than the sum of its proper divisors (1).

16470642421 is an equidigital number, since it uses as much as digits as its factorization.

16470642421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64512, while the sum is 37.

The spelling of 16470642421 in words is "sixteen billion, four hundred seventy million, six hundred forty-two thousand, four hundred twenty-one".