21020022230 has 32 divisors (see below), whose sum is σ = 40021953984. Its totient is φ = 7932266496.

The previous prime is 21020022209. The next prime is 21020022241. The reversal of 21020022230 is 3222002012.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 609179 + ... + 642758.

It is an arithmetic number, because the mean of its divisors is an integer number (1250686062).

Almost surely, 2^21020022230 is an apocalyptic number.

21020022230 is a deficient number, since it is larger than the sum of its proper divisors (19001931754).

21020022230 is a wasteful number, since it uses less digits than its factorization.

21020022230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1252040.

The product of its (nonzero) digits is 96, while the sum is 14.

Adding to 21020022230 its reverse (3222002012), we get a palindrome (24242024242).

The spelling of 21020022230 in words is "twenty-one billion, twenty million, twenty-two thousand, two hundred thirty".