21941242 has 8 divisors (see below), whose sum is σ = 33973632. Its totient is φ = 10616700.

The previous prime is 21941233. The next prime is 21941243. The reversal of 21941242 is 24214912.

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

It is not an unprimeable number, because it can be changed into a prime (21941243) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 176884 + ... + 177007.

It is an arithmetic number, because the mean of its divisors is an integer number (4246704).

Almost surely, 2^21941242 is an apocalyptic number.

21941242 is a deficient number, since it is larger than the sum of its proper divisors (12032390).

21941242 is a wasteful number, since it uses less digits than its factorization.

21941242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 353924.

The product of its digits is 1152, while the sum is 25.

The square root of 21941242 is about 4684.1479481332. The cubic root of 21941242 is about 279.9542527302.

The spelling of 21941242 in words is "twenty-one million, nine hundred forty-one thousand, two hundred forty-two".