21104054 has 12 divisors (see below), whose sum is σ = 32787924. Its totient is φ = 10187352.

The previous prime is 21104033. The next prime is 21104059. The reversal of 21104054 is 45040112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21104059) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4592 + ... + 7955.

It is an arithmetic number, because the mean of its divisors is an integer number (2732327).

Almost surely, 2^21104054 is an apocalyptic number.

21104054 is a deficient number, since it is larger than the sum of its proper divisors (11683870).

21104054 is a wasteful number, since it uses less digits than its factorization.

21104054 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12607 (or 12578 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 21104054 is about 4593.9148881972. The cubic root of 21104054 is about 276.3473450128.

Adding to 21104054 its reverse (45040112), we get a palindrome (66144166).

The spelling of 21104054 in words is "twenty-one million, one hundred four thousand, fifty-four".