20232100021 has 4 divisors (see below), whose sum is σ = 23122400032. Its totient is φ = 17341800012.

The previous prime is 20232099971. The next prime is 20232100033. The reversal of 20232100021 is 12000123202.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20232100021 - 2¹¹ = 20232097973 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20232099974 and 20232100010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20232100321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1445149995 + ... + 1445150008.

It is an arithmetic number, because the mean of its divisors is an integer number (5780600008).

Almost surely, 2^20232100021 is an apocalyptic number.

It is an amenable number.

20232100021 is a deficient number, since it is larger than the sum of its proper divisors (2890300011).

20232100021 is an equidigital number, since it uses as much as digits as its factorization.

20232100021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2890300010.

The product of its (nonzero) digits is 48, while the sum is 13.

Adding to 20232100021 its reverse (12000123202), we get a palindrome (32232223223).

The spelling of 20232100021 in words is "twenty billion, two hundred thirty-two million, one hundred thousand, twenty-one".