21230302 has 8 divisors (see below), whose sum is σ = 32248800. Its totient is φ = 10480704.

The previous prime is 21230299. The next prime is 21230303. The reversal of 21230302 is 20303212.

It is a happy number.

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

It is a super-2 number, since 2×21230302² = 901451446022408, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21230303) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67027 + ... + 67342.

It is an arithmetic number, because the mean of its divisors is an integer number (4031100).

Almost surely, 2^21230302 is an apocalyptic number.

21230302 is a deficient number, since it is larger than the sum of its proper divisors (11018498).

21230302 is a wasteful number, since it uses less digits than its factorization.

21230302 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134450.

The product of its (nonzero) digits is 72, while the sum is 13.

The square root of 21230302 is about 4607.6351852116. The cubic root of 21230302 is about 276.8973019181.

Adding to 21230302 its reverse (20303212), we get a palindrome (41533514).

The spelling of 21230302 in words is "twenty-one million, two hundred thirty thousand, three hundred two".