21458014 has 8 divisors (see below), whose sum is σ = 33225408. Its totient is φ = 10382880.

The previous prime is 21458009. The next prime is 21458027. The reversal of 21458014 is 41085412.

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

It is a self number, because there is not a number n which added to its sum of digits gives 21458014.

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, 172987 + ... + 173110.

It is an arithmetic number, because the mean of its divisors is an integer number (4153176).

Almost surely, 2^21458014 is an apocalyptic number.

21458014 is a deficient number, since it is larger than the sum of its proper divisors (11767394).

21458014 is a wasteful number, since it uses less digits than its factorization.

21458014 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 346130.

The product of its (nonzero) digits is 1280, while the sum is 25.

The square root of 21458014 is about 4632.2795684199. The cubic root of 21458014 is about 277.8837652200.

The spelling of 21458014 in words is "twenty-one million, four hundred fifty-eight thousand, fourteen".