16427450321 has 2 divisors, whose sum is σ = 16427450322. Its totient is φ = 16427450320.

The previous prime is 16427450297. The next prime is 16427450383. The reversal of 16427450321 is 12305472461.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16367620096 + 59830225 = 127936^2 + 7735^2 .

It is a cyclic number.

It is not a de Polignac number, because 16427450321 - 2¹⁸ = 16427188177 is a prime.

It is a super-2 number, since 2×16427450321² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (16427450021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8213725160 + 8213725161.

It is an arithmetic number, because the mean of its divisors is an integer number (8213725161).

Almost surely, 2^16427450321 is an apocalyptic number.

It is an amenable number.

16427450321 is a deficient number, since it is larger than the sum of its proper divisors (1).

16427450321 is an equidigital number, since it uses as much as digits as its factorization.

16427450321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40320, while the sum is 35.

The spelling of 16427450321 in words is "sixteen billion, four hundred twenty-seven million, four hundred fifty thousand, three hundred twenty-one".