20201102020 has 48 divisors (see below), whose sum is σ = 46498326336. Its totient is φ = 7311024000.

The previous prime is 20201101997. The next prime is 20201102041. The reversal of 20201102020 is 2020110202.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 20201101988 and 20201102006.

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, 171171 + ... + 264010.

It is an arithmetic number, because the mean of its divisors is an integer number (968715132).

Almost surely, 2^20201102020 is an apocalyptic number.

20201102020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20201102020 is an abundant number, since it is smaller than the sum of its proper divisors (26297224316).

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

20201102020 is a wasteful number, since it uses less digits than its factorization.

20201102020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 435412 (or 435410 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

20201102020 divided by its sum of digits (10) gives a palindrome (2020110202).

Adding to 20201102020 its reverse (2020110202), we get a palindrome (22221212222).

It can be divided in two parts, 20201 and 102020, that added together give a palindrome (122221).

The spelling of 20201102020 in words is "twenty billion, two hundred one million, one hundred two thousand, twenty".