21334023 has 10 divisors (see below), whose sum is σ = 31869464. Its totient is φ = 14222628.

The previous prime is 21334007. The next prime is 21334039. The reversal of 21334023 is 32043312.

It is an interprime number because it is at equal distance from previous prime (21334007) and next prime (21334039).

It is not a de Polignac number, because 21334023 - 2⁴ = 21334007 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21333987 and 21334005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21334123) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 131611 + ... + 131772.

Almost surely, 2^21334023 is an apocalyptic number.

21334023 is a deficient number, since it is larger than the sum of its proper divisors (10535441).

21334023 is an equidigital number, since it uses as much as digits as its factorization.

21334023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 263395 (or 263386 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 18.

The square root of 21334023 is about 4618.8768115203. The cubic root of 21334023 is about 277.3474983840.

Adding to 21334023 its reverse (32043312), we get a palindrome (53377335).

It can be divided in two parts, 2 and 1334023, that added together give a square (1334025 = 1155²).

The spelling of 21334023 in words is "twenty-one million, three hundred thirty-four thousand, twenty-three".