16501880019 has 24 divisors (see below), whose sum is σ = 23254533120. Its totient is φ = 10407407472.

The previous prime is 16501879967. The next prime is 16501880029. The reversal of 16501880019 is 91008810561.

It is not a de Polignac number, because 16501880019 - 2²⁷ = 16367662291 is a prime.

It is a super-2 number, since 2×16501880019² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (16501880029) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 776862 + ... + 797820.

It is an arithmetic number, because the mean of its divisors is an integer number (968938880).

Almost surely, 2^16501880019 is an apocalyptic number.

16501880019 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

16501880019 is a deficient number, since it is larger than the sum of its proper divisors (6752653101).

16501880019 is a wasteful number, since it uses less digits than its factorization.

16501880019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21727 (or 21708 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 39.

The spelling of 16501880019 in words is "sixteen billion, five hundred one million, eight hundred eighty thousand, nineteen".