16530019 has 16 divisors (see below), whose sum is σ = 19152000. Its totient is φ = 14109120.

The previous prime is 16530013. The next prime is 16530043. The reversal of 16530019 is 91003561.

It is a cyclic number.

It is not a de Polignac number, because 16530019 - 2⁵ = 16529987 is a prime.

It is a super-2 number, since 2×16530019² = 546483056280722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 16529975 and 16530002.

It is not an unprimeable number, because it can be changed into a prime (16530013) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28767 + ... + 29335.

It is an arithmetic number, because the mean of its divisors is an integer number (1197000).

Almost surely, 2^16530019 is an apocalyptic number.

16530019 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

16530019 is a deficient number, since it is larger than the sum of its proper divisors (2621981).

16530019 is a wasteful number, since it uses less digits than its factorization.

16530019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 738.

The product of its (nonzero) digits is 810, while the sum is 25.

The square root of 16530019 is about 4065.7126066657. The cubic root of 16530019 is about 254.7364648903.

It can be divided in two parts, 16 and 530019, that added together give a palindrome (530035).

The spelling of 16530019 in words is "sixteen million, five hundred thirty thousand, nineteen".