21241949 has 8 divisors (see below), whose sum is σ = 22930560. Its totient is φ = 19617136.

The previous prime is 21241939. The next prime is 21241951. The reversal of 21241949 is 94914212.

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 21241949 - 2¹⁶ = 21176413 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21241939) 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, 15257 + ... + 16590.

It is an arithmetic number, because the mean of its divisors is an integer number (2866320).

Almost surely, 2^21241949 is an apocalyptic number.

21241949 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

21241949 is a deficient number, since it is larger than the sum of its proper divisors (1688611).

21241949 is a wasteful number, since it uses less digits than its factorization.

21241949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31899.

The product of its digits is 5184, while the sum is 32.

The square root of 21241949 is about 4608.8988923603. The cubic root of 21241949 is about 276.9479281928.

The spelling of 21241949 in words is "twenty-one million, two hundred forty-one thousand, nine hundred forty-nine".