21714843 has 16 divisors (see below), whose sum is σ = 29514240. Its totient is φ = 14198976.

The previous prime is 21714839. The next prime is 21714851. The reversal of 21714843 is 34841712.

It is not a de Polignac number, because 21714843 - 2² = 21714839 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21714843.

It is not an unprimeable number, because it can be changed into a prime (21714863) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44346 + ... + 44832.

It is an arithmetic number, because the mean of its divisors is an integer number (1844640).

Almost surely, 2^21714843 is an apocalyptic number.

21714843 is a deficient number, since it is larger than the sum of its proper divisors (7799397).

21714843 is a wasteful number, since it uses less digits than its factorization.

21714843 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 746.

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

The square root of 21714843 is about 4659.9187761162. The cubic root of 21714843 is about 278.9880263614.

The spelling of 21714843 in words is "twenty-one million, seven hundred fourteen thousand, eight hundred forty-three".