21323030 has 8 divisors (see below), whose sum is σ = 38381472. Its totient is φ = 8529208.

The previous prime is 21323021. The next prime is 21323053. The reversal of 21323030 is 3032312.

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 = 21322996 and 21323014.

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, 1066142 + ... + 1066161.

It is an arithmetic number, because the mean of its divisors is an integer number (4797684).

Almost surely, 2^21323030 is an apocalyptic number.

21323030 is a deficient number, since it is larger than the sum of its proper divisors (17058442).

21323030 is a wasteful number, since it uses less digits than its factorization.

21323030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2132310.

The product of its (nonzero) digits is 108, while the sum is 14.

The square root of 21323030 is about 4617.6866502611. The cubic root of 21323030 is about 277.2998529731.

Adding to 21323030 its reverse (3032312), we get a palindrome (24355342).

The spelling of 21323030 in words is "twenty-one million, three hundred twenty-three thousand, thirty".