20023032021 has 32 divisors (see below), whose sum is σ = 28822677120. Its totient is φ = 12317220864.

The previous prime is 20023032019. The next prime is 20023032037. The reversal of 20023032021 is 12023032002.

It is not a de Polignac number, because 20023032021 - 2¹ = 20023032019 is a prime.

It is a super-2 number, since 2×20023032021² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20023030021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6142290 + ... + 6145548.

It is an arithmetic number, because the mean of its divisors is an integer number (900708660).

Almost surely, 2^20023032021 is an apocalyptic number.

It is an amenable number.

20023032021 is a deficient number, since it is larger than the sum of its proper divisors (8799645099).

20023032021 is a wasteful number, since it uses less digits than its factorization.

20023032021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5605.

The product of its (nonzero) digits is 144, while the sum is 15.

Adding to 20023032021 its reverse (12023032002), we get a palindrome (32046064023).

The spelling of 20023032021 in words is "twenty billion, twenty-three million, thirty-two thousand, twenty-one".