20012011020 has 36 divisors (see below), whose sum is σ = 60703100640. Its totient is φ = 5336536224.

The previous prime is 20012011013. The next prime is 20012011027. The reversal of 20012011020 is 2011021002.

It is an interprime number because it is at equal distance from previous prime (20012011013) and next prime (20012011027).

It is a tau number, because it is divible by the number of its divisors (36).

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 = 20012010993 and 20012011011.

It is not an unprimeable number, because it can be changed into a prime (20012011027) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 55588740 + ... + 55589099.

It is an arithmetic number, because the mean of its divisors is an integer number (1686197240).

Almost surely, 2^20012011020 is an apocalyptic number.

20012011020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20012011020 is an abundant number, since it is smaller than the sum of its proper divisors (40691089620).

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

20012011020 is a wasteful number, since it uses less digits than its factorization.

20012011020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111177854 (or 111177849 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 20012011020 its reverse (2011021002), we get a palindrome (22023032022).

It can be divided in two parts, 2001 and 2011020, that added together give a triangular number (2013021 = T₂₀₀₆).

The spelling of 20012011020 in words is "twenty billion, twelve million, eleven thousand, twenty".