21427054 has 8 divisors (see below), whose sum is σ = 35062488. Its totient is φ = 9739560.

The previous prime is 21427039. The next prime is 21427073. The reversal of 21427054 is 45072412.

It is a sphenic number, since it is the product of 3 distinct primes.

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, 486957 + ... + 487000.

It is an arithmetic number, because the mean of its divisors is an integer number (4382811).

Almost surely, 2^21427054 is an apocalyptic number.

21427054 is a deficient number, since it is larger than the sum of its proper divisors (13635434).

21427054 is a wasteful number, since it uses less digits than its factorization.

21427054 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 973970.

The product of its (nonzero) digits is 2240, while the sum is 25.

The square root of 21427054 is about 4628.9365949427. The cubic root of 21427054 is about 277.7500556986.

Adding to 21427054 its reverse (45072412), we get a palindrome (66499466).

The spelling of 21427054 in words is "twenty-one million, four hundred twenty-seven thousand, fifty-four".