20323020 has 24 divisors (see below), whose sum is σ = 56904624. Its totient is φ = 5419456.

The previous prime is 20323019. The next prime is 20323021. The reversal of 20323020 is 2032302.

It is an interprime number because it is at equal distance from previous prime (20323019) and next prime (20323021).

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 = 20322987 and 20323005.

It is not an unprimeable number, because it can be changed into a prime (20323021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 169299 + ... + 169418.

It is an arithmetic number, because the mean of its divisors is an integer number (2371026).

Almost surely, 2^20323020 is an apocalyptic number.

20323020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20323020 is an abundant number, since it is smaller than the sum of its proper divisors (36581604).

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

20323020 is a wasteful number, since it uses less digits than its factorization.

20323020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 338729 (or 338727 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 12.

The square root of 20323020 is about 4508.1060324708. The cubic root of 20323020 is about 272.8953160333.

Adding to 20323020 its reverse (2032302), we get a palindrome (22355322).

The spelling of 20323020 in words is "twenty million, three hundred twenty-three thousand, twenty".