21054514 has 16 divisors (see below), whose sum is σ = 34480152. Its totient is φ = 9583488.

The previous prime is 21054457. The next prime is 21054521. The reversal of 21054514 is 41545012.

It can be written as a sum of positive squares in 4 ways, for example, as 18275625 + 2778889 = 4275^2 + 1667^2 .

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, 3649 + ... + 7444.

Almost surely, 2^21054514 is an apocalyptic number.

21054514 is a deficient number, since it is larger than the sum of its proper divisors (13425638).

21054514 is a wasteful number, since it uses less digits than its factorization.

21054514 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11181.

The product of its (nonzero) digits is 800, while the sum is 22.

The square root of 21054514 is about 4588.5198049044. The cubic root of 21054514 is about 276.1309415088.

Adding to 21054514 its reverse (41545012), we get a palindrome (62599526).

The spelling of 21054514 in words is "twenty-one million, fifty-four thousand, five hundred fourteen".