21104133420 has 24 divisors (see below), whose sum is σ = 59091573744. Its totient is φ = 5627768896.

The previous prime is 21104133403. The next prime is 21104133451. The reversal of 21104133420 is 2433140112.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 175867719 + ... + 175867838.

It is an arithmetic number, because the mean of its divisors is an integer number (2462148906).

Almost surely, 2^21104133420 is an apocalyptic number.

21104133420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21104133420 is an abundant number, since it is smaller than the sum of its proper divisors (37987440324).

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

21104133420 is a wasteful number, since it uses less digits than its factorization.

21104133420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 351735569 (or 351735567 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 21104133420 its reverse (2433140112), we get a palindrome (23537273532).

The spelling of 21104133420 in words is "twenty-one billion, one hundred four million, one hundred thirty-three thousand, four hundred twenty".