21002230442 has 32 divisors (see below), whose sum is σ = 33392991744. Its totient is φ = 9885942000.

The previous prime is 21002230439. The next prime is 21002230499. The reversal of 21002230442 is 24403220012.

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, 4716317 + ... + 4720767.

It is an arithmetic number, because the mean of its divisors is an integer number (1043530992).

Almost surely, 2^21002230442 is an apocalyptic number.

21002230442 is a deficient number, since it is larger than the sum of its proper divisors (12390761302).

21002230442 is a wasteful number, since it uses less digits than its factorization.

21002230442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6074.

The product of its (nonzero) digits is 768, while the sum is 20.

Adding to 21002230442 its reverse (24403220012), we get a palindrome (45405450454).

The spelling of 21002230442 in words is "twenty-one billion, two million, two hundred thirty thousand, four hundred forty-two".