21468774 has 8 divisors (see below), whose sum is σ = 42937560. Its totient is φ = 7156256.

The previous prime is 21468751. The next prime is 21468779. The reversal of 21468774 is 47786412.

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

21468774 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21468779) by changing a digit.

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, 1789059 + ... + 1789070.

It is an arithmetic number, because the mean of its divisors is an integer number (5367195).

Almost surely, 2^21468774 is an apocalyptic number.

21468774 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.

21468774 is a wasteful number, since it uses less digits than its factorization.

21468774 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3578134.

The product of its digits is 75264, while the sum is 39.

The square root of 21468774 is about 4633.4408380813. The cubic root of 21468774 is about 277.9302052070.

The spelling of 21468774 in words is "twenty-one million, four hundred sixty-eight thousand, seven hundred seventy-four".