21124054 has 16 divisors (see below), whose sum is σ = 36389376. Its totient is φ = 9009000.

The previous prime is 21124031. The next prime is 21124063. The reversal of 21124054 is 45042112.

It is a congruent number.

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, 622 + ... + 6529.

It is an arithmetic number, because the mean of its divisors is an integer number (2274336).

Almost surely, 2^21124054 is an apocalyptic number.

21124054 is a deficient number, since it is larger than the sum of its proper divisors (15265322).

21124054 is a wasteful number, since it uses less digits than its factorization.

21124054 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7371.

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 21124054 is about 4596.0911653273. The cubic root of 21124054 is about 276.4346142153.

Adding to 21124054 its reverse (45042112), we get a palindrome (66166166).

The spelling of 21124054 in words is "twenty-one million, one hundred twenty-four thousand, fifty-four".