16020421365 has 32 divisors (see below), whose sum is σ = 27613272960. Its totient is φ = 7884446976.

The previous prime is 16020421343. The next prime is 16020421411. The reversal of 16020421365 is 56312402061.

It is not a de Polignac number, because 16020421365 - 2⁶ = 16020421301 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 693166 + ... + 715904.

It is an arithmetic number, because the mean of its divisors is an integer number (862914780).

Almost surely, 2^16020421365 is an apocalyptic number.

16020421365 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16020421365 is a deficient number, since it is larger than the sum of its proper divisors (11592851595).

16020421365 is a wasteful number, since it uses less digits than its factorization.

16020421365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26373.

The product of its (nonzero) digits is 8640, while the sum is 30.

The spelling of 16020421365 in words is "sixteen billion, twenty million, four hundred twenty-one thousand, three hundred sixty-five".