20011023021 has 8 divisors (see below), whose sum is σ = 29106942624. Its totient is φ = 12127892720.

The previous prime is 20011023013. The next prime is 20011023059. The reversal of 20011023021 is 12032011002.

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 20011023021 - 2³ = 20011023013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20011022988 and 20011023006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20011023061) 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, 303197286 + ... + 303197351.

It is an arithmetic number, because the mean of its divisors is an integer number (3638367828).

Almost surely, 2^20011023021 is an apocalyptic number.

It is an amenable number.

20011023021 is a deficient number, since it is larger than the sum of its proper divisors (9095919603).

20011023021 is a wasteful number, since it uses less digits than its factorization.

20011023021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 606394651.

The product of its (nonzero) digits is 24, while the sum is 12.

Adding to 20011023021 its reverse (12032011002), we get a palindrome (32043034023).

The spelling of 20011023021 in words is "twenty billion, eleven million, twenty-three thousand, twenty-one".