21846481 has 8 divisors (see below), whose sum is σ = 23353344. Its totient is φ = 20386080.

The previous prime is 21846469. The next prime is 21846497. The reversal of 21846481 is 18464812.

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 21846481 - 2²¹ = 19749329 is a prime.

It is a super-2 number, since 2×21846481² = 954537464166722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21846421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10641 + ... + 12526.

It is an arithmetic number, because the mean of its divisors is an integer number (2919168).

Almost surely, 2^21846481 is an apocalyptic number.

It is an amenable number.

21846481 is a deficient number, since it is larger than the sum of its proper divisors (1506863).

21846481 is a wasteful number, since it uses less digits than its factorization.

21846481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23231.

The product of its digits is 12288, while the sum is 34.

The square root of 21846481 is about 4674.0219297731. The cubic root of 21846481 is about 279.5506440360.

The spelling of 21846481 in words is "twenty-one million, eight hundred forty-six thousand, four hundred eighty-one".