16000036000021 has 8 divisors (see below), whose sum is σ = 16243307655200. Its totient is φ = 15756895672848.

The previous prime is 16000035999971. The next prime is 16000036000079. The reversal of 16000036000021 is 12000063000061.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16000036000021 is a prime.

It is the 4000005-th Hogben number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16000036070021) by changing a digit.

It is a nontrivial repunit in base 4000004.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32586471 + ... + 33073828.

It is an arithmetic number, because the mean of its divisors is an integer number (2030413456900).

Almost surely, 2^{16000036000021} is an apocalyptic number.

It is an amenable number.

16000036000021 is a deficient number, since it is larger than the sum of its proper divisors (243271655179).

16000036000021 is an equidigital number, since it uses as much as digits as its factorization.

16000036000021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65664003.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 16000036000021 its reverse (12000063000061), we get a palindrome (28000099000082).

The spelling of 16000036000021 in words is "sixteen trillion, thirty-six million, twenty-one", and thus it is an aban number and an uban number.