20010012020 has 12 divisors (see below), whose sum is σ = 42021025284. Its totient is φ = 8004004800.

The previous prime is 20010012017. The next prime is 20010012023. The reversal of 20010012020 is 2021001002.

It is an interprime number because it is at equal distance from previous prime (20010012017) and next prime (20010012023).

It can be written as a sum of positive squares in 2 ways, for example, as 10511170576 + 9498841444 = 102524^2 + 97462^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20010011989 and 20010012007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20010012023) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 500250281 + ... + 500250320.

It is an arithmetic number, because the mean of its divisors is an integer number (3501752107).

Almost surely, 2^20010012020 is an apocalyptic number.

20010012020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20010012020 is an abundant number, since it is smaller than the sum of its proper divisors (22011013264).

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

20010012020 is a wasteful number, since it uses less digits than its factorization.

20010012020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1000500610 (or 1000500608 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 8.

Adding to 20010012020 its reverse (2021001002), we get a palindrome (22031013022).

The spelling of 20010012020 in words is "twenty billion, ten million, twelve thousand, twenty".