16539232019 has 2 divisors, whose sum is σ = 16539232020. Its totient is φ = 16539232018.

The previous prime is 16539232013. The next prime is 16539232033. The reversal of 16539232019 is 91023293561.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16539232019 is a prime.

It is a super-2 number, since 2×16539232019² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (16539232013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8269616009 + 8269616010.

It is an arithmetic number, because the mean of its divisors is an integer number (8269616010).

Almost surely, 2^16539232019 is an apocalyptic number.

16539232019 is a deficient number, since it is larger than the sum of its proper divisors (1).

16539232019 is an equidigital number, since it uses as much as digits as its factorization.

16539232019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 87480, while the sum is 41.

The spelling of 16539232019 in words is "sixteen billion, five hundred thirty-nine million, two hundred thirty-two thousand, nineteen".