20163320 has 32 divisors (see below), whose sum is σ = 46228320. Its totient is φ = 7912320.

The previous prime is 20163317. The next prime is 20163331. The reversal of 20163320 is 2336102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2636 + ... + 6875.

It is an arithmetic number, because the mean of its divisors is an integer number (1444635).

Almost surely, 2^20163320 is an apocalyptic number.

20163320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20163320 is an abundant number, since it is smaller than the sum of its proper divisors (26065000).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20163320 is a wasteful number, since it uses less digits than its factorization.

20163320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9575 (or 9571 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 20163320 is about 4490.3585602934. The cubic root of 20163320 is about 272.1786240203.

Adding to 20163320 its reverse (2336102), we get a palindrome (22499422).

The spelling of 20163320 in words is "twenty million, one hundred sixty-three thousand, three hundred twenty".