21034413404804 has 12 divisors (see below), whose sum is σ = 36821861236944. Its totient is φ = 10513881622824.

The previous prime is 21034413404803. The next prime is 21034413404857. The reversal of 21034413404804 is 40840431443012.

It is not an unprimeable number, because it can be changed into a prime (21034413404803) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 831255662 + ... + 831280965.

It is an arithmetic number, because the mean of its divisors is an integer number (3068488436412).

Almost surely, 2^{21034413404804} is an apocalyptic number.

It is an amenable number.

21034413404804 is a deficient number, since it is larger than the sum of its proper divisors (15787447832140).

21034413404804 is a wasteful number, since it uses less digits than its factorization.

21034413404804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1662539794 (or 1662539792 counting only the distinct ones).

The product of its (nonzero) digits is 147456, while the sum is 38.

Adding to 21034413404804 its reverse (40840431443012), we get a palindrome (61874844847816).

The spelling of 21034413404804 in words is "twenty-one trillion, thirty-four billion, four hundred thirteen million, four hundred four thousand, eight hundred four".