20020500 has 96 divisors (see below), whose sum is σ = 64821120. Its totient is φ = 5335200.

The previous prime is 20020489. The next prime is 20020501. The reversal of 20020500 is 502002.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20020501) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12759 + ... + 14241.

It is an arithmetic number, because the mean of its divisors is an integer number (675220).

Almost surely, 2^20020500 is an apocalyptic number.

20020500 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 20020500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32410560).

20020500 is an abundant number, since it is smaller than the sum of its proper divisors (44800620).

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

20020500 is a wasteful number, since it uses less digits than its factorization.

20020500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1511 (or 1493 counting only the distinct ones).

The product of its (nonzero) digits is 20, while the sum is 9.

The square root of 20020500 is about 4474.4273376601. The cubic root of 20020500 is about 271.5344725924.

Adding to 20020500 its reverse (502002), we get a palindrome (20522502).

The spelling of 20020500 in words is "twenty million, twenty thousand, five hundred".