21232430 has 8 divisors (see below), whose sum is σ = 38218392. Its totient is φ = 8492968.

The previous prime is 21232429. The next prime is 21232441. The reversal of 21232430 is 3423212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 21232399 and 21232408.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1061612 + ... + 1061631.

It is an arithmetic number, because the mean of its divisors is an integer number (4777299).

Almost surely, 2^21232430 is an apocalyptic number.

21232430 is a deficient number, since it is larger than the sum of its proper divisors (16985962).

21232430 is a wasteful number, since it uses less digits than its factorization.

21232430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2123250.

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 21232430 is about 4607.8661004851. The cubic root of 21232430 is about 276.9065531253.

Adding to 21232430 its reverse (3423212), we get a palindrome (24655642).

The spelling of 21232430 in words is "twenty-one million, two hundred thirty-two thousand, four hundred thirty".