21414873 has 8 divisors (see below), whose sum is σ = 28820448. Its totient is φ = 14142944.

The previous prime is 21414871. The next prime is 21414923. The reversal of 21414873 is 37841412.

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 21414873 - 2¹ = 21414871 is a prime.

It is a super-2 number, since 2×21414873² = 917193571212258, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21414873.

It is not an unprimeable number, because it can be changed into a prime (21414871) 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, 33036 + ... + 33677.

It is an arithmetic number, because the mean of its divisors is an integer number (3602556).

Almost surely, 2^21414873 is an apocalyptic number.

It is an amenable number.

21414873 is a deficient number, since it is larger than the sum of its proper divisors (7405575).

21414873 is a wasteful number, since it uses less digits than its factorization.

21414873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66823.

The product of its digits is 5376, while the sum is 30.

The square root of 21414873 is about 4627.6206629325. The cubic root of 21414873 is about 277.6974132970.

The spelling of 21414873 in words is "twenty-one million, four hundred fourteen thousand, eight hundred seventy-three".