20201212020 has 48 divisors (see below), whose sum is σ = 61705522368. Its totient is φ = 4897263360.

The previous prime is 20201212019. The next prime is 20201212039. The reversal of 20201212020 is 2021210202.

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 = 20201211987 and 20201212005.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15303289 + ... + 15304608.

It is an arithmetic number, because the mean of its divisors is an integer number (1285531716).

Almost surely, 2^20201212020 is an apocalyptic number.

20201212020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20201212020 is an abundant number, since it is smaller than the sum of its proper divisors (41504310348).

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

20201212020 is a wasteful number, since it uses less digits than its factorization.

20201212020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30607920 (or 30607918 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 20201212020 its reverse (2021210202), we get a palindrome (22222422222).

It can be divided in two parts, 20201 and 212020, that added together give a triangular number (232221 = T₆₈₁).

The spelling of 20201212020 in words is "twenty billion, two hundred one million, two hundred twelve thousand, twenty".