20120102020 has 24 divisors (see below), whose sum is σ = 42259117824. Its totient is φ = 8046725856.

The previous prime is 20120102011. The next prime is 20120102029. The reversal of 20120102020 is 2020102102.

It is an interprime number because it is at equal distance from previous prime (20120102011) and next prime (20120102029).

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 = 20120101988 and 20120102006.

It is not an unprimeable number, because it can be changed into a prime (20120102029) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 48339 + ... + 206341.

It is an arithmetic number, because the mean of its divisors is an integer number (1760796576).

Almost surely, 2^20120102020 is an apocalyptic number.

20120102020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20120102020 is an abundant number, since it is smaller than the sum of its proper divisors (22139015804).

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

20120102020 is a wasteful number, since it uses less digits than its factorization.

20120102020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164379 (or 164377 counting only the distinct ones).

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

Adding to 20120102020 its reverse (2020102102), we get a palindrome (22140204122).

The spelling of 20120102020 in words is "twenty billion, one hundred twenty million, one hundred two thousand, twenty".