21232323 has 12 divisors (see below), whose sum is σ = 35050288. Its totient is φ = 12132720.

The previous prime is 21232307. The next prime is 21232363. The reversal of 21232323 is 32323212.

It is a happy number.

21232323 is an esthetic number in base 10, because in such base its adjacent digits differ by 1.

It is not a de Polignac number, because 21232323 - 2⁴ = 21232307 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a junction number, because it is equal to n+sod(n) for n = 21232296 and 21232305.

It is not an unprimeable number, because it can be changed into a prime (21232363) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 168448 + ... + 168573.

Almost surely, 2^21232323 is an apocalyptic number.

21232323 is a deficient number, since it is larger than the sum of its proper divisors (13817965).

21232323 is a wasteful number, since it uses less digits than its factorization.

21232323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 337034 (or 337031 counting only the distinct ones).

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

The square root of 21232323 is about 4607.8544898901. The cubic root of 21232323 is about 276.9060879713.

Adding to 21232323 its reverse (32323212), we get a palindrome (53555535).

The spelling of 21232323 in words is "twenty-one million, two hundred thirty-two thousand, three hundred twenty-three".