21467873 has 8 divisors (see below), whose sum is σ = 24579648. Its totient is φ = 18367344.

The previous prime is 21467869. The next prime is 21467893. The reversal of 21467873 is 37876412.

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 21467873 - 2² = 21467869 is a prime.

It is a super-2 number, since 2×21467873² = 921739142288258, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21467813) 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, 1790 + ... + 6792.

It is an arithmetic number, because the mean of its divisors is an integer number (3072456).

Almost surely, 2^21467873 is an apocalyptic number.

It is an amenable number.

21467873 is a deficient number, since it is larger than the sum of its proper divisors (3111775).

21467873 is an equidigital number, since it uses as much as digits as its factorization.

21467873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5623.

The product of its digits is 56448, while the sum is 38.

The square root of 21467873 is about 4633.3436091013. The cubic root of 21467873 is about 277.9263171009.

The spelling of 21467873 in words is "twenty-one million, four hundred sixty-seven thousand, eight hundred seventy-three".