21054104 has 16 divisors (see below), whose sum is σ = 39580920. Its totient is φ = 10499200.

The previous prime is 21054067. The next prime is 21054119. The reversal of 21054104 is 40145012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 74 + ... + 6489.

Almost surely, 2^21054104 is an apocalyptic number.

It is an amenable number.

21054104 is a deficient number, since it is larger than the sum of its proper divisors (18526816).

21054104 is a wasteful number, since it uses less digits than its factorization.

21054104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6970 (or 6966 counting only the distinct ones).

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

The square root of 21054104 is about 4588.4751279701. The cubic root of 21054104 is about 276.1291491074.

Adding to 21054104 its reverse (40145012), we get a palindrome (61199116).

The spelling of 21054104 in words is "twenty-one million, fifty-four thousand, one hundred four".