21023232230 has 128 divisors (see below), whose sum is σ = 51671208960. Its totient is φ = 5945955840.

The previous prime is 21023232169. The next prime is 21023232287. The reversal of 21023232230 is 3223232012.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 572792 + ... + 608388.

It is an arithmetic number, because the mean of its divisors is an integer number (403681320).

Almost surely, 2^21023232230 is an apocalyptic number.

21023232230 is an abundant number, since it is smaller than the sum of its proper divisors (30647976730).

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

21023232230 is a wasteful number, since it uses less digits than its factorization.

21023232230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35694.

The product of its (nonzero) digits is 864, while the sum is 20.

Adding to 21023232230 its reverse (3223232012), we get a palindrome (24246464242).

The spelling of 21023232230 in words is "twenty-one billion, twenty-three million, two hundred thirty-two thousand, two hundred thirty".