20323030021 has 16 divisors (see below), whose sum is σ = 24571648000. Its totient is φ = 16419961008.

The previous prime is 20323030009. The next prime is 20323030027. The reversal of 20323030021 is 12003032302.

It is a cyclic number.

It is not a de Polignac number, because 20323030021 - 2¹⁷ = 20322898949 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20323029977 and 20323030004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20323030027) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 357465 + ... + 410398.

It is an arithmetic number, because the mean of its divisors is an integer number (1535728000).

Almost surely, 2^20323030021 is an apocalyptic number.

It is an amenable number.

20323030021 is a deficient number, since it is larger than the sum of its proper divisors (4248617979).

20323030021 is a wasteful number, since it uses less digits than its factorization.

20323030021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 768088.

The product of its (nonzero) digits is 216, while the sum is 16.

Adding to 20323030021 its reverse (12003032302), we get a palindrome (32326062323).

The spelling of 20323030021 in words is "twenty billion, three hundred twenty-three million, thirty thousand, twenty-one".