20205010020 has 96 divisors (see below), whose sum is σ = 64132548480. Its totient is φ = 4711772160.

The previous prime is 20205010019. The next prime is 20205010037. The reversal of 20205010020 is 2001050202.

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 = 20205009978 and 20205010005.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 666861 + ... + 696500.

It is an arithmetic number, because the mean of its divisors is an integer number (668047380).

Almost surely, 2^20205010020 is an apocalyptic number.

20205010020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20205010020 is an abundant number, since it is smaller than the sum of its proper divisors (43927538460).

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

20205010020 is a wasteful number, since it uses less digits than its factorization.

20205010020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1363405 (or 1363403 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 12.

Adding to 20205010020 its reverse (2001050202), we get a palindrome (22206060222).

The spelling of 20205010020 in words is "twenty billion, two hundred five million, ten thousand, twenty".