21004234022 has 8 divisors (see below), whose sum is σ = 31950102672. Its totient is φ = 10354199800.

The previous prime is 21004234003. The next prime is 21004234033. The reversal of 21004234022 is 22043240012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 21004233985 and 21004234003.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 73958429 + ... + 73958712.

It is an arithmetic number, because the mean of its divisors is an integer number (3993762834).

Almost surely, 2^21004234022 is an apocalyptic number.

21004234022 is a deficient number, since it is larger than the sum of its proper divisors (10945868650).

21004234022 is a wasteful number, since it uses less digits than its factorization.

21004234022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147917214.

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

Adding to 21004234022 its reverse (22043240012), we get a palindrome (43047474034).

The spelling of 21004234022 in words is "twenty-one billion, four million, two hundred thirty-four thousand, twenty-two".