21333333230 has 32 divisors (see below), whose sum is σ = 41896932480. Its totient is φ = 7756460320.

The previous prime is 21333333227. The next prime is 21333333317. The reversal of 21333333230 is 3233333312.

It is a super-2 number, since 2×21333333230² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 21333333230.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1451177 + ... + 1465803.

It is an arithmetic number, because the mean of its divisors is an integer number (1309279140).

Almost surely, 2^21333333230 is an apocalyptic number.

21333333230 is a deficient number, since it is larger than the sum of its proper divisors (20563599250).

21333333230 is a wasteful number, since it uses less digits than its factorization.

21333333230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27904.

The product of its (nonzero) digits is 8748, while the sum is 26.

Adding to 21333333230 its reverse (3233333312), we get a palindrome (24566666542).

The spelling of 21333333230 in words is "twenty-one billion, three hundred thirty-three million, three hundred thirty-three thousand, two hundred thirty".