21941494 has 8 divisors (see below), whose sum is σ = 34343280. Its totient is φ = 10493736.

The previous prime is 21941489. The next prime is 21941501. The reversal of 21941494 is 49414912.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 238449 + ... + 238540.

It is an arithmetic number, because the mean of its divisors is an integer number (4292910).

Almost surely, 2^21941494 is an apocalyptic number.

21941494 is a deficient number, since it is larger than the sum of its proper divisors (12401786).

21941494 is a wasteful number, since it uses less digits than its factorization.

21941494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 477014.

The product of its digits is 10368, while the sum is 34.

The square root of 21941494 is about 4684.1748472917. The cubic root of 21941494 is about 279.9553245048.

The spelling of 21941494 in words is "twenty-one million, nine hundred forty-one thousand, four hundred ninety-four".