20502020 has 48 divisors (see below), whose sum is σ = 53682048. Its totient is φ = 6389760.

The previous prime is 20502019. The next prime is 20502023. The reversal of 20502020 is 2020502.

It is a Harshad number since it is a multiple of its sum of digits (11).

It is a junction number, because it is equal to n+sod(n) for n = 20501992 and 20502010.

It is not an unprimeable number, because it can be changed into a prime (20502023) 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, 5117 + ... + 8196.

It is an arithmetic number, because the mean of its divisors is an integer number (1118376).

Almost surely, 2^20502020 is an apocalyptic number.

20502020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20502020 is an abundant number, since it is smaller than the sum of its proper divisors (33180028).

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

20502020 is a wasteful number, since it uses less digits than its factorization.

20502020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13340 (or 13338 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 11.

The square root of 20502020 is about 4527.9156352565. The cubic root of 20502020 is about 273.6941727792.

Adding to 20502020 its reverse (2020502), we get a palindrome (22522522).

The spelling of 20502020 in words is "twenty million, five hundred two thousand, twenty".