16230308821 has 2 divisors, whose sum is σ = 16230308822. Its totient is φ = 16230308820.

The previous prime is 16230308753. The next prime is 16230308873. The reversal of 16230308821 is 12880303261.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16157206321 + 73102500 = 127111^2 + 8550^2 .

It is a cyclic number.

It is not a de Polignac number, because 16230308821 - 2¹³ = 16230300629 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16230308021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8115154410 + 8115154411.

It is an arithmetic number, because the mean of its divisors is an integer number (8115154411).

Almost surely, 2^16230308821 is an apocalyptic number.

It is an amenable number.

16230308821 is a deficient number, since it is larger than the sum of its proper divisors (1).

16230308821 is an equidigital number, since it uses as much as digits as its factorization.

16230308821 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13824, while the sum is 34.

The spelling of 16230308821 in words is "sixteen billion, two hundred thirty million, three hundred eight thousand, eight hundred twenty-one".