20161323 has 48 divisors (see below), whose sum is σ = 36341760. Its totient is φ = 10487232.

The previous prime is 20161321. The next prime is 20161327. The reversal of 20161323 is 32316102.

It is not a de Polignac number, because 20161323 - 2¹ = 20161321 is a prime.

It is a super-2 number, since 2×20161323² = 812957890220658, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20161296 and 20161305.

It is not an unprimeable number, because it can be changed into a prime (20161321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 84238 + ... + 84476.

It is an arithmetic number, because the mean of its divisors is an integer number (757120).

Almost surely, 2^20161323 is an apocalyptic number.

20161323 is a deficient number, since it is larger than the sum of its proper divisors (16180437).

20161323 is a wasteful number, since it uses less digits than its factorization.

20161323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 368 (or 365 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 20161323 is about 4490.1361894713. The cubic root of 20161323 is about 272.1696380885.

Adding to 20161323 its reverse (32316102), we get a palindrome (52477425).

The spelling of 20161323 in words is "twenty million, one hundred sixty-one thousand, three hundred twenty-three".