21002033023 has 2 divisors, whose sum is σ = 21002033024. Its totient is φ = 21002033022.

The previous prime is 21002032973. The next prime is 21002033071. The reversal of 21002033023 is 32033020012.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21002033023 - 2⁹ = 21002032511 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21002032988 and 21002033006.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21002033323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10501016511 + 10501016512.

It is an arithmetic number, because the mean of its divisors is an integer number (10501016512).

Almost surely, 2^21002033023 is an apocalyptic number.

21002033023 is a deficient number, since it is larger than the sum of its proper divisors (1).

21002033023 is an equidigital number, since it uses as much as digits as its factorization.

21002033023 is an evil number, because the sum of its binary digits is even.

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

Adding to 21002033023 its reverse (32033020012), we get a palindrome (53035053035).

The spelling of 21002033023 in words is "twenty-one billion, two million, thirty-three thousand, twenty-three".