16008107021 has 4 divisors (see below), whose sum is σ = 16051024572. Its totient is φ = 15965189472.

The previous prime is 16008106979. The next prime is 16008107023. The reversal of 16008107021 is 12070180061.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 13268736100 + 2739370921 = 115190^2 + 52339^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16008107021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16008107023) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21458216 + ... + 21458961.

It is an arithmetic number, because the mean of its divisors is an integer number (4012756143).

Almost surely, 2^16008107021 is an apocalyptic number.

It is an amenable number.

16008107021 is a deficient number, since it is larger than the sum of its proper divisors (42917551).

16008107021 is an equidigital number, since it uses as much as digits as its factorization.

16008107021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42917550.

The product of its (nonzero) digits is 672, while the sum is 26.

Adding to 16008107021 its reverse (12070180061), we get a palindrome (28078287082).

The spelling of 16008107021 in words is "sixteen billion, eight million, one hundred seven thousand, twenty-one".