163620420 has 24 divisors (see below), whose sum is σ = 458137344. Its totient is φ = 43632096.

The previous prime is 163620409. The next prime is 163620469. The reversal of 163620420 is 24026361.

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, 1363444 + ... + 1363563.

It is an arithmetic number, because the mean of its divisors is an integer number (19089056).

Almost surely, 2^163620420 is an apocalyptic number.

163620420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

163620420 is an abundant number, since it is smaller than the sum of its proper divisors (294516924).

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

163620420 is a wasteful number, since it uses less digits than its factorization.

163620420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2727019 (or 2727017 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 163620420 is about 12791.4197804622. The cubic root of 163620420 is about 546.9477427917.

Adding to 163620420 its reverse (24026361), we get a palindrome (187646781).

The spelling of 163620420 in words is "one hundred sixty-three million, six hundred twenty thousand, four hundred twenty".