20202120020 has 24 divisors (see below), whose sum is σ = 42820946784. Its totient is φ = 8005325216.

The previous prime is 20202120019. The next prime is 20202120023. The reversal of 20202120020 is 2002120202.

It is a junction number, because it is equal to n+sod(n) for n = 20202119983 and 20202120010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20202120023) 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, 4717982 + ... + 4722261.

It is an arithmetic number, because the mean of its divisors is an integer number (1784206116).

Almost surely, 2^20202120020 is an apocalyptic number.

20202120020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20202120020 is an abundant number, since it is smaller than the sum of its proper divisors (22618826764).

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

20202120020 is a wasteful number, since it uses less digits than its factorization.

20202120020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9440359 (or 9440357 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 11.

Adding to 20202120020 its reverse (2002120202), we get a palindrome (22204240222).

The spelling of 20202120020 in words is "twenty billion, two hundred two million, one hundred twenty thousand, twenty".