163920620 has 12 divisors (see below), whose sum is σ = 344233344. Its totient is φ = 65568240.

The previous prime is 163920607. The next prime is 163920629. The reversal of 163920620 is 26029361.

It is a super-2 number, since 2×163920620² = 53739939322368800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (163920629) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4097996 + ... + 4098035.

It is an arithmetic number, because the mean of its divisors is an integer number (28686112).

Almost surely, 2^163920620 is an apocalyptic number.

163920620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

163920620 is an abundant number, since it is smaller than the sum of its proper divisors (180312724).

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

163920620 is a wasteful number, since it uses less digits than its factorization.

163920620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8196040 (or 8196038 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 29.

The square root of 163920620 is about 12803.1488314399. The cubic root of 163920620 is about 547.2820396913.

Adding to 163920620 its reverse (26029361), we get a palindrome (189949981).

The spelling of 163920620 in words is "one hundred sixty-three million, nine hundred twenty thousand, six hundred twenty".