16681432303 has 2 divisors, whose sum is σ = 16681432304. Its totient is φ = 16681432302.

The previous prime is 16681432297. The next prime is 16681432349. The reversal of 16681432303 is 30323418661.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 16681432303 - 2²¹ = 16679335151 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16681432003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8340716151 + 8340716152.

It is an arithmetic number, because the mean of its divisors is an integer number (8340716152).

Almost surely, 2^16681432303 is an apocalyptic number.

16681432303 is a deficient number, since it is larger than the sum of its proper divisors (1).

16681432303 is an equidigital number, since it uses as much as digits as its factorization.

16681432303 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 62208, while the sum is 37.

It can be divided in two parts, 1668 and 1432303, that added together give a triangular number (1433971 = T₁₆₉₃).

The spelling of 16681432303 in words is "sixteen billion, six hundred eighty-one million, four hundred thirty-two thousand, three hundred three".