20336220 has 36 divisors (see below), whose sum is σ = 61687080. Its totient is φ = 5422944.

The previous prime is 20336207. The next prime is 20336231. The reversal of 20336220 is 2263302.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 20336193 and 20336202.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 56310 + ... + 56669.

It is an arithmetic number, because the mean of its divisors is an integer number (1713530).

Almost surely, 2^20336220 is an apocalyptic number.

20336220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20336220 is an abundant number, since it is smaller than the sum of its proper divisors (41350860).

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

20336220 is a wasteful number, since it uses less digits than its factorization.

20336220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112994 (or 112989 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 18.

The square root of 20336220 is about 4509.5698242737. The cubic root of 20336220 is about 272.9543859708.

Adding to 20336220 its reverse (2263302), we get a palindrome (22599522).

The spelling of 20336220 in words is "twenty million, three hundred thirty-six thousand, two hundred twenty".