20210002020 has 144 divisors (see below), whose sum is σ = 68889929472. Its totient is φ = 4758462720.

The previous prime is 20210001991. The next prime is 20210002051. The reversal of 20210002020 is 2020001202.

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

It is a junction number, because it is equal to n+sod(n) for n = 20210001993 and 20210002011.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 133936 + ... + 241575.

It is an arithmetic number, because the mean of its divisors is an integer number (478402288).

Almost surely, 2^20210002020 is an apocalyptic number.

20210002020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20210002020 is an abundant number, since it is smaller than the sum of its proper divisors (48679927452).

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

20210002020 is a wasteful number, since it uses less digits than its factorization.

20210002020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 375562 (or 375557 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 9.

Adding to 20210002020 its reverse (2020001202), we get a palindrome (22230003222).

The spelling of 20210002020 in words is "twenty billion, two hundred ten million, two thousand, twenty".