21414946 has 16 divisors (see below), whose sum is σ = 37566144. Its totient is φ = 8964144.

The previous prime is 21414941. The next prime is 21414947. The reversal of 21414946 is 64941412.

It is not an unprimeable number, because it can be changed into a prime (21414941) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17185 + ... + 18388.

It is an arithmetic number, because the mean of its divisors is an integer number (2347884).

Almost surely, 2^21414946 is an apocalyptic number.

21414946 is a deficient number, since it is larger than the sum of its proper divisors (16151198).

21414946 is a wasteful number, since it uses less digits than its factorization.

21414946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35625.

The product of its digits is 6912, while the sum is 31.

The square root of 21414946 is about 4627.6285503484. The cubic root of 21414946 is about 277.6977288392.

The spelling of 21414946 in words is "twenty-one million, four hundred fourteen thousand, nine hundred forty-six".