21946934 has 8 divisors (see below), whose sum is σ = 33026520. Its totient is φ = 10938096.

The previous prime is 21946909. The next prime is 21946937. The reversal of 21946934 is 43964912.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21946937) 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, 16904 + ... + 18155.

It is an arithmetic number, because the mean of its divisors is an integer number (4128315).

Almost surely, 2^21946934 is an apocalyptic number.

21946934 is a deficient number, since it is larger than the sum of its proper divisors (11079586).

21946934 is a wasteful number, since it uses less digits than its factorization.

21946934 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35374.

The product of its digits is 46656, while the sum is 38.

The square root of 21946934 is about 4684.7554898842. The cubic root of 21946934 is about 279.9784592272.

The spelling of 21946934 in words is "twenty-one million, nine hundred forty-six thousand, nine hundred thirty-four".