20021332230 has 48 divisors (see below), whose sum is σ = 52131839760. Its totient is φ = 5331188544.

The previous prime is 20021332189. The next prime is 20021332249. The reversal of 20021332230 is 3223312002.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 101385 + ... + 224324.

It is an arithmetic number, because the mean of its divisors is an integer number (1086079995).

Almost surely, 2^20021332230 is an apocalyptic number.

20021332230 is an abundant number, since it is smaller than the sum of its proper divisors (32110507530).

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

20021332230 is a wasteful number, since it uses less digits than its factorization.

20021332230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 326405 (or 326402 counting only the distinct ones).

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

Adding to 20021332230 its reverse (3223312002), we get a palindrome (23244644232).

The spelling of 20021332230 in words is "twenty billion, twenty-one million, three hundred thirty-two thousand, two hundred thirty".