21494841 has 8 divisors (see below), whose sum is σ = 28681920. Its totient is φ = 14318832.

The previous prime is 21494831. The next prime is 21494843. The reversal of 21494841 is 14849412.

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

It is not a de Polignac number, because 21494841 - 2⁹ = 21494329 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21494843) 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, 4476 + ... + 7938.

It is an arithmetic number, because the mean of its divisors is an integer number (3585240).

Almost surely, 2^21494841 is an apocalyptic number.

It is an amenable number.

21494841 is a deficient number, since it is larger than the sum of its proper divisors (7187079).

21494841 is a wasteful number, since it uses less digits than its factorization.

21494841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5535.

The product of its digits is 9216, while the sum is 33.

The square root of 21494841 is about 4636.2529050948. The cubic root of 21494841 is about 278.0426456669.

The spelling of 21494841 in words is "twenty-one million, four hundred ninety-four thousand, eight hundred forty-one".