16306821403 has 2 divisors, whose sum is σ = 16306821404. Its totient is φ = 16306821402.

The previous prime is 16306821361. The next prime is 16306821437. The reversal of 16306821403 is 30412860361.

It is a happy number.

It is an a-pointer prime, because the next prime (16306821437) can be obtained adding 16306821403 to its sum of digits (34).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 16306821403 - 2⁹ = 16306820891 is a prime.

It is not a weakly prime, because it can be changed into another prime (16306824403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8153410701 + 8153410702.

It is an arithmetic number, because the mean of its divisors is an integer number (8153410702).

Almost surely, 2^16306821403 is an apocalyptic number.

16306821403 is a deficient number, since it is larger than the sum of its proper divisors (1).

16306821403 is an equidigital number, since it uses as much as digits as its factorization.

16306821403 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20736, while the sum is 34.

The spelling of 16306821403 in words is "sixteen billion, three hundred six million, eight hundred twenty-one thousand, four hundred three".