20450120 has 32 divisors (see below), whose sum is σ = 46249920. Its totient is φ = 8137920.

The previous prime is 20450117. The next prime is 20450141. The reversal of 20450120 is 2105402.

It is a junction number, because it is equal to n+sod(n) for n = 20450095 and 20450104.

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, 7229 + ... + 9651.

It is an arithmetic number, because the mean of its divisors is an integer number (1445310).

Almost surely, 2^20450120 is an apocalyptic number.

20450120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20450120 is an abundant number, since it is smaller than the sum of its proper divisors (25799800).

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

20450120 is a wasteful number, since it uses less digits than its factorization.

20450120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2645 (or 2641 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 14.

The square root of 20450120 is about 4522.1808897920. The cubic root of 20450120 is about 273.4630292028.

Adding to 20450120 its reverse (2105402), we get a palindrome (22555522).

The spelling of 20450120 in words is "twenty million, four hundred fifty thousand, one hundred twenty".