21000023332230 has 192 divisors, whose sum is σ = 51978856621824. Its totient is φ = 5429705702400.

The previous prime is 21000023332201. The next prime is 21000023332237. The reversal of 21000023332230 is 3223332000012.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 21000023332197 and 21000023332206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21000023332237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 12907204677 + ... + 12907206303.

It is an arithmetic number, because the mean of its divisors is an integer number (270723211572).

Almost surely, 2^{21000023332230} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21000023332230, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25989428310912).

21000023332230 is an abundant number, since it is smaller than the sum of its proper divisors (30978833289594).

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

21000023332230 is a wasteful number, since it uses less digits than its factorization.

21000023332230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3143 (or 3102 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 21.

Adding to 21000023332230 its reverse (3223332000012), we get a palindrome (24223355332242).

The spelling of 21000023332230 in words is "twenty-one trillion, twenty-three million, three hundred thirty-two thousand, two hundred thirty".