21394914 has 8 divisors (see below), whose sum is σ = 42789840. Its totient is φ = 7131636.

The previous prime is 21394903. The next prime is 21394921. The reversal of 21394914 is 41949312.

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

21394914 is an admirable number.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1782904 + ... + 1782915.

It is an arithmetic number, because the mean of its divisors is an integer number (5348730).

Almost surely, 2^21394914 is an apocalyptic number.

21394914 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21394914 is a wasteful number, since it uses less digits than its factorization.

21394914 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3565824.

The product of its digits is 7776, while the sum is 33.

The square root of 21394914 is about 4625.4636524353. The cubic root of 21394914 is about 277.6111136883.

The spelling of 21394914 in words is "twenty-one million, three hundred ninety-four thousand, nine hundred fourteen".