20413220 has 24 divisors (see below), whose sum is σ = 45124800. Its totient is φ = 7735392.

The previous prime is 20413219. The next prime is 20413231. The reversal of 20413220 is 2231402.

It is a junction number, because it is equal to n+sod(n) for n = 20413195 and 20413204.

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, 26480 + ... + 27239.

It is an arithmetic number, because the mean of its divisors is an integer number (1880200).

Almost surely, 2^20413220 is an apocalyptic number.

20413220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20413220 is an abundant number, since it is smaller than the sum of its proper divisors (24711580).

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

20413220 is a wasteful number, since it uses less digits than its factorization.

20413220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53747 (or 53745 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 20413220 is about 4518.0991578318. The cubic root of 20413220 is about 273.2984521554.

Adding to 20413220 its reverse (2231402), we get a palindrome (22644622).

The spelling of 20413220 in words is "twenty million, four hundred thirteen thousand, two hundred twenty".