21202303230 has 80 divisors (see below), whose sum is σ = 57791766384. Its totient is φ = 5576480640.

The previous prime is 21202303223. The next prime is 21202303237. The reversal of 21202303230 is 3230320212.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (21202303223) and next prime (21202303237).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21202303237) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 120156 + ... + 238415.

Almost surely, 2^21202303230 is an apocalyptic number.

21202303230 is an abundant number, since it is smaller than the sum of its proper divisors (36589463154).

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

21202303230 is a wasteful number, since it uses less digits than its factorization.

21202303230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 358663 (or 358654 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 18.

Adding to 21202303230 its reverse (3230320212), we get a palindrome (24432623442).

The spelling of 21202303230 in words is "twenty-one billion, two hundred two million, three hundred three thousand, two hundred thirty".