20001011020 has 48 divisors (see below), whose sum is σ = 44506542528. Its totient is φ = 7524085760.

The previous prime is 20001010999. The next prime is 20001011021. The reversal of 20001011020 is 2011010002.

It is a super-2 number, since 2×20001011020² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20001010994 and 20001011012.

It is not an unprimeable number, because it can be changed into a prime (20001011021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 441129 + ... + 484351.

It is an arithmetic number, because the mean of its divisors is an integer number (927219636).

Almost surely, 2^20001011020 is an apocalyptic number.

20001011020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20001011020 is an abundant number, since it is smaller than the sum of its proper divisors (24505531508).

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

20001011020 is a wasteful number, since it uses less digits than its factorization.

20001011020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44610 (or 44608 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 7.

Adding to 20001011020 its reverse (2011010002), we get a palindrome (22012021022).

The spelling of 20001011020 in words is "twenty billion, one million, eleven thousand, twenty".