163320020 has 48 divisors (see below), whose sum is σ = 371625408. Its totient is φ = 60049920.

The previous prime is 163320019. The next prime is 163320023. The reversal of 163320020 is 20023361.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163320023) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9035 + ... + 20205.

It is an arithmetic number, because the mean of its divisors is an integer number (7742196).

Almost surely, 2^163320020 is an apocalyptic number.

163320020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 163320020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (185812704).

163320020 is an abundant number, since it is smaller than the sum of its proper divisors (208305388).

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

163320020 is a wasteful number, since it uses less digits than its factorization.

163320020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11240 (or 11238 counting only the distinct ones).

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

The square root of 163320020 is about 12779.6721397695. The cubic root of 163320020 is about 546.6128136189.

Adding to 163320020 its reverse (20023361), we get a palindrome (183343381).

The spelling of 163320020 in words is "one hundred sixty-three million, three hundred twenty thousand, twenty".