21023320230 has 64 divisors (see below), whose sum is σ = 61158758400. Its totient is φ = 5096561760.

The previous prime is 21023320193. The next prime is 21023320231. The reversal of 21023320230 is 3202332012.

It is a happy number.

21023320230 is a `hidden beast` number, since 2 + 102 + 332 + 0 + 230 = 666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21023320231) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3536310 + ... + 3542249.

It is an arithmetic number, because the mean of its divisors is an integer number (955605600).

Almost surely, 2^21023320230 is an apocalyptic number.

21023320230 is an abundant number, since it is smaller than the sum of its proper divisors (40135438170).

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

21023320230 is a wasteful number, since it uses less digits than its factorization.

21023320230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7078586 (or 7078580 counting only the distinct ones).

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

Adding to 21023320230 its reverse (3202332012), we get a palindrome (24225652242).

The spelling of 21023320230 in words is "twenty-one billion, twenty-three million, three hundred twenty thousand, two hundred thirty".