20162391321 has 8 divisors (see below), whose sum is σ = 26883845440. Its totient is φ = 13441265712.

The previous prime is 20162391311. The next prime is 20162391341. The reversal of 20162391321 is 12319326102.

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

It is not a de Polignac number, because 20162391321 - 2¹⁷ = 20162260249 is a prime.

It is a super-2 number, since 2×20162391321² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20162391311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 188211 + ... + 275223.

It is an arithmetic number, because the mean of its divisors is an integer number (3360480680).

Almost surely, 2^20162391321 is an apocalyptic number.

It is an amenable number.

20162391321 is a deficient number, since it is larger than the sum of its proper divisors (6721454119).

20162391321 is an equidigital number, since it uses as much as digits as its factorization.

20162391321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164255.

The product of its (nonzero) digits is 3888, while the sum is 30.

The spelling of 20162391321 in words is "twenty billion, one hundred sixty-two million, three hundred ninety-one thousand, three hundred twenty-one".