21946673 has 8 divisors (see below), whose sum is σ = 25193280. Its totient is φ = 18727920.

The previous prime is 21946651. The next prime is 21946681. The reversal of 21946673 is 37664912.

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

It is a cyclic number.

It is not a de Polignac number, because 21946673 - 2¹² = 21942577 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21946693) 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, 5243 + ... + 8448.

It is an arithmetic number, because the mean of its divisors is an integer number (3149160).

Almost surely, 2^21946673 is an apocalyptic number.

It is an amenable number.

21946673 is a deficient number, since it is larger than the sum of its proper divisors (3246607).

21946673 is a wasteful number, since it uses less digits than its factorization.

21946673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13927.

The product of its digits is 54432, while the sum is 38.

The square root of 21946673 is about 4684.7276334916. The cubic root of 21946673 is about 279.9773493582.

The spelling of 21946673 in words is "twenty-one million, nine hundred forty-six thousand, six hundred seventy-three".