21923466 has 8 divisors (see below), whose sum is σ = 43846944. Its totient is φ = 7307820.

The previous prime is 21923453. The next prime is 21923509. The reversal of 21923466 is 66432912.

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

21923466 is an admirable number.

It is a super-2 number, since 2×21923466² = 961276722906312, which contains 22 as substring.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1826950 + ... + 1826961.

It is an arithmetic number, because the mean of its divisors is an integer number (5480868).

Almost surely, 2^21923466 is an apocalyptic number.

21923466 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.

21923466 is a wasteful number, since it uses less digits than its factorization.

21923466 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3653916.

The product of its digits is 15552, while the sum is 33.

The square root of 21923466 is about 4682.2501001121. The cubic root of 21923466 is about 279.8786293703.

The spelling of 21923466 in words is "twenty-one million, nine hundred twenty-three thousand, four hundred sixty-six".