21143323230 has 32 divisors (see below), whose sum is σ = 50830464384. Its totient is φ = 5628609696.

The previous prime is 21143323217. The next prime is 21143323241. The reversal of 21143323230 is 3232334112.

It is a super-4 number, since 4×21143323230⁴ (a number of 42 digits) contains 4444 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21143323230.

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, 582712 + ... + 617931.

It is an arithmetic number, because the mean of its divisors is an integer number (1588452012).

Almost surely, 2^21143323230 is an apocalyptic number.

21143323230 is an abundant number, since it is smaller than the sum of its proper divisors (29687141154).

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

21143323230 is a wasteful number, since it uses less digits than its factorization.

21143323230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1201240.

The product of its (nonzero) digits is 2592, while the sum is 24.

Adding to 21143323230 its reverse (3232334112), we get a palindrome (24375657342).

The spelling of 21143323230 in words is "twenty-one billion, one hundred forty-three million, three hundred twenty-three thousand, two hundred thirty".