20480220 has 36 divisors (see below), whose sum is σ = 62123880. Its totient is φ = 5461344.

The previous prime is 20480209. The next prime is 20480249. The reversal of 20480220 is 2208402.

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

It is a super-2 number, since 2×20480220² = 838878822496800, which contains 22 as substring.

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 = 20480193 and 20480202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 56710 + ... + 57069.

Almost surely, 2^20480220 is an apocalyptic number.

20480220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20480220 is an abundant number, since it is smaller than the sum of its proper divisors (41643660).

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

20480220 is a wasteful number, since it uses less digits than its factorization.

20480220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113794 (or 113789 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 20480220 is about 4525.5077063242. The cubic root of 20480220 is about 273.5971311385.

Adding to 20480220 its reverse (2208402), we get a palindrome (22688622).

The spelling of 20480220 in words is "twenty million, four hundred eighty thousand, two hundred twenty".