20300020 has 48 divisors (see below), whose sum is σ = 46287360. Its totient is φ = 7433856.

The previous prime is 20300017. The next prime is 20300039. The reversal of 20300020 is 2000302.

It is a junction number, because it is equal to n+sod(n) for n = 20299976 and 20300012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42141 + ... + 42619.

It is an arithmetic number, because the mean of its divisors is an integer number (964320).

Almost surely, 2^20300020 is an apocalyptic number.

20300020 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 20300020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23143680).

20300020 is an abundant number, since it is smaller than the sum of its proper divisors (25987340).

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

20300020 is a wasteful number, since it uses less digits than its factorization.

20300020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 664 (or 662 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 7.

The square root of 20300020 is about 4505.5543499108. The cubic root of 20300020 is about 272.7923300017.

Adding to 20300020 its reverse (2000302), we get a palindrome (22300322).

The spelling of 20300020 in words is "twenty million, three hundred thousand, twenty".