21020332002023 has 4 divisors (see below), whose sum is σ = 21316393016208. Its totient is φ = 20724270987840.

The previous prime is 21020332001953. The next prime is 21020332002041. The reversal of 21020332002023 is 32020023302012.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21020332002023 - 2¹⁸ = 21020331739879 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21020332001986 and 21020332002004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21020332802023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 148030506986 + ... + 148030507127.

It is an arithmetic number, because the mean of its divisors is an integer number (5329098254052).

Almost surely, 2^{21020332002023} is an apocalyptic number.

21020332002023 is a deficient number, since it is larger than the sum of its proper divisors (296061014185).

21020332002023 is an equidigital number, since it uses as much as digits as its factorization.

21020332002023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 296061014184.

The product of its (nonzero) digits is 864, while the sum is 20.

Adding to 21020332002023 its reverse (32020023302012), we get a palindrome (53040355304035).

The spelling of 21020332002023 in words is "twenty-one trillion, twenty billion, three hundred thirty-two million, two thousand, twenty-three".