21463846 has 12 divisors (see below), whose sum is σ = 32761332. Its totient is φ = 10546604.

The previous prime is 21463831. The next prime is 21463847. The reversal of 21463846 is 64836412.

It is a super-2 number, since 2×21463846² = 921393370223432, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21463847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5421 + ... + 8503.

It is an arithmetic number, because the mean of its divisors is an integer number (2730111).

Almost surely, 2^21463846 is an apocalyptic number.

21463846 is a deficient number, since it is larger than the sum of its proper divisors (11297486).

21463846 is an equidigital number, since it uses as much as digits as its factorization.

21463846 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3203 (or 3144 counting only the distinct ones).

The product of its digits is 27648, while the sum is 34.

The square root of 21463846 is about 4632.9090213385. The cubic root of 21463846 is about 277.9089379647.

The spelling of 21463846 in words is "twenty-one million, four hundred sixty-three thousand, eight hundred forty-six".