16540819 has 2 divisors, whose sum is σ = 16540820. Its totient is φ = 16540818.

The previous prime is 16540801. The next prime is 16540829. The reversal of 16540819 is 91804561.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 16540819 - 2⁵ = 16540787 is a prime.

It is a super-2 number, since 2×16540819² = 547197386381522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (16540829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8270409 + 8270410.

It is an arithmetic number, because the mean of its divisors is an integer number (8270410).

Almost surely, 2^16540819 is an apocalyptic number.

16540819 is a deficient number, since it is larger than the sum of its proper divisors (1).

16540819 is an equidigital number, since it uses as much as digits as its factorization.

16540819 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8640, while the sum is 34.

The square root of 16540819 is about 4067.0405702427. The cubic root of 16540819 is about 254.7919307446.

The spelling of 16540819 in words is "sixteen million, five hundred forty thousand, eight hundred nineteen".