2000000021 has 8 divisors (see below), whose sum is σ = 2105956800. Its totient is φ = 1894112640.

The previous prime is 2000000011. The next prime is 2000000033. The reversal of 2000000021 is 1200000002.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2000000021 - 2¹⁸ = 1999737877 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1999999951 and 2000000014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2000000011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48200 + ... + 79518.

It is an arithmetic number, because the mean of its divisors is an integer number (263244600).

Almost surely, 2^2000000021 is an apocalyptic number.

It is an amenable number.

2000000021 is a deficient number, since it is larger than the sum of its proper divisors (105956779).

2000000021 is a wasteful number, since it uses less digits than its factorization.

2000000021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34699.

The product of its (nonzero) digits is 4, while the sum is 5.

The square root of 2000000021 is about 44721.3597847829. The cubic root of 2000000021 is about 1259.9210543046.

Adding to 2000000021 its reverse (1200000002), we get a palindrome (3200000023).

The spelling of 2000000021 in words is "two billion, twenty-one", and thus it is an aban number and an uban number.