21946466 has 8 divisors (see below), whose sum is σ = 33477840. Its totient is φ = 10787188.

The previous prime is 21946459. The next prime is 21946487. The reversal of 21946466 is 66464912.

It is a happy number.

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

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, 92876 + ... + 93111.

It is an arithmetic number, because the mean of its divisors is an integer number (4184730).

Almost surely, 2^21946466 is an apocalyptic number.

21946466 is a deficient number, since it is larger than the sum of its proper divisors (11531374).

21946466 is a wasteful number, since it uses less digits than its factorization.

21946466 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186048.

The product of its digits is 62208, while the sum is 38.

The square root of 21946466 is about 4684.7055403728. The cubic root of 21946466 is about 279.9764691110.

The spelling of 21946466 in words is "twenty-one million, nine hundred forty-six thousand, four hundred sixty-six".