20000012021 has 8 divisors (see below), whose sum is σ = 22034217888. Its totient is φ = 18001810000.

The previous prime is 20000011963. The next prime is 20000012029. The reversal of 20000012021 is 12021000002.

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 20000012021 - 2¹⁴ = 19999995637 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20000012029) 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, 8999795 + ... + 9002016.

It is an arithmetic number, because the mean of its divisors is an integer number (2754277236).

Almost surely, 2^20000012021 is an apocalyptic number.

It is an amenable number.

20000012021 is a deficient number, since it is larger than the sum of its proper divisors (2034205867).

20000012021 is a wasteful number, since it uses less digits than its factorization.

20000012021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18001923.

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

Adding to 20000012021 its reverse (12021000002), we get a palindrome (32021012023).

The spelling of 20000012021 in words is "twenty billion, twelve thousand, twenty-one".