16821395485 has 8 divisors (see below), whose sum is σ = 20187949536. Its totient is φ = 13455599760.

The previous prime is 16821395477. The next prime is 16821395489. The reversal of 16821395485 is 58459312861.

It is a happy number.

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

It is not a de Polignac number, because 16821395485 - 2³ = 16821395477 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 (16821395489) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 139579 + ... + 230488.

It is an arithmetic number, because the mean of its divisors is an integer number (2523493692).

Almost surely, 2^16821395485 is an apocalyptic number.

It is an amenable number.

16821395485 is a deficient number, since it is larger than the sum of its proper divisors (3366554051).

16821395485 is an equidigital number, since it uses as much as digits as its factorization.

16821395485 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 379163.

The product of its digits is 2073600, while the sum is 52.

The spelling of 16821395485 in words is "sixteen billion, eight hundred twenty-one million, three hundred ninety-five thousand, four hundred eighty-five".