21314918 has 16 divisors (see below), whose sum is σ = 33275904. Its totient is φ = 10228680.

The previous prime is 21314893. The next prime is 21314927. The reversal of 21314918 is 81941312.

It is a congruent number.

It is an unprimeable number.

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, 6521 + ... + 9227.

It is an arithmetic number, because the mean of its divisors is an integer number (2079744).

Almost surely, 2^21314918 is an apocalyptic number.

21314918 is a deficient number, since it is larger than the sum of its proper divisors (11960986).

21314918 is a wasteful number, since it uses less digits than its factorization.

21314918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2867.

The product of its digits is 1728, while the sum is 29.

The square root of 21314918 is about 4616.8082048099. The cubic root of 21314918 is about 277.2646837731.

The spelling of 21314918 in words is "twenty-one million, three hundred fourteen thousand, nine hundred eighteen".