21233030 has 32 divisors (see below), whose sum is σ = 47041344. Its totient is φ = 6719616.

The previous prime is 21233029. The next prime is 21233059. The reversal of 21233030 is 3033212.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a junction number, because it is equal to n+sod(n) for n = 21232996 and 21233014.

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, 10757 + ... + 12576.

It is an arithmetic number, because the mean of its divisors is an integer number (1470042).

Almost surely, 2^21233030 is an apocalyptic number.

21233030 is an abundant number, since it is smaller than the sum of its proper divisors (25808314).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21233030 is a wasteful number, since it uses less digits than its factorization.

21233030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23360.

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

The square root of 21233030 is about 4607.9312060837. The cubic root of 21233030 is about 276.9091614367.

Adding to 21233030 its reverse (3033212), we get a palindrome (24266242).

The spelling of 21233030 in words is "twenty-one million, two hundred thirty-three thousand, thirty".