20002011021 has 32 divisors (see below), whose sum is σ = 30345553920. Its totient is φ = 13014337392.

The previous prime is 20002010989. The next prime is 20002011067. The reversal of 20002011021 is 12011020002.

It is not a de Polignac number, because 20002011021 - 2⁵ = 20002010989 is a prime.

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 = 20002010994 and 20002011012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20002019021) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1646050 + ... + 1658156.

It is an arithmetic number, because the mean of its divisors is an integer number (948298560).

Almost surely, 2^20002011021 is an apocalyptic number.

It is an amenable number.

20002011021 is a deficient number, since it is larger than the sum of its proper divisors (10343542899).

20002011021 is a wasteful number, since it uses less digits than its factorization.

20002011021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13582 (or 13576 counting only the distinct ones).

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

Adding to 20002011021 its reverse (12011020002), we get a palindrome (32013031023).

It can be divided in two parts, 2000 and 2011021, that added together give a triangular number (2013021 = T₂₀₀₆).

The spelling of 20002011021 in words is "twenty billion, two million, eleven thousand, twenty-one".