20413020 has 48 divisors (see below), whose sum is σ = 57859200. Its totient is φ = 5376576.

The previous prime is 20412991. The next prime is 20413021. The reversal of 20413020 is 2031402.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 20412987 and 20413005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20413021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2931 + ... + 7029.

It is an arithmetic number, because the mean of its divisors is an integer number (1205400).

Almost surely, 2^20413020 is an apocalyptic number.

20413020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20413020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28929600).

20413020 is an abundant number, since it is smaller than the sum of its proper divisors (37446180).

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

20413020 is a wasteful number, since it uses less digits than its factorization.

20413020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4194 (or 4192 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 12.

The square root of 20413020 is about 4518.0770245758. The cubic root of 20413020 is about 273.2975595987.

Adding to 20413020 its reverse (2031402), we get a palindrome (22444422).

The spelling of 20413020 in words is "twenty million, four hundred thirteen thousand, twenty".