16035616021 has 2 divisors, whose sum is σ = 16035616022. Its totient is φ = 16035616020.

The previous prime is 16035615989. The next prime is 16035616049. The reversal of 16035616021 is 12061653061.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9106884900 + 6928731121 = 95430^2 + 83239^2 .

It is a cyclic number.

It is not a de Polignac number, because 16035616021 - 2⁵ = 16035615989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16035616081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8017808010 + 8017808011.

It is an arithmetic number, because the mean of its divisors is an integer number (8017808011).

Almost surely, 2^16035616021 is an apocalyptic number.

It is an amenable number.

16035616021 is a deficient number, since it is larger than the sum of its proper divisors (1).

16035616021 is an equidigital number, since it uses as much as digits as its factorization.

16035616021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6480, while the sum is 31.

The spelling of 16035616021 in words is "sixteen billion, thirty-five million, six hundred sixteen thousand, twenty-one".