21314986 has 32 divisors (see below), whose sum is σ = 40533120. Its totient is φ = 8164800.

The previous prime is 21314947. The next prime is 21314999. The reversal of 21314986 is 68941312.

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 15 ways as a sum of consecutive naturals, for example, 8260 + ... + 10528.

It is an arithmetic number, because the mean of its divisors is an integer number (1266660).

Almost surely, 2^21314986 is an apocalyptic number.

21314986 is a deficient number, since it is larger than the sum of its proper divisors (19218134).

21314986 is a wasteful number, since it uses less digits than its factorization.

21314986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2350.

The product of its digits is 10368, while the sum is 34.

The square root of 21314986 is about 4616.8155691992. The cubic root of 21314986 is about 277.2649786210.

It can be divided in two parts, 2131 and 4986, that added together give a palindrome (7117).

The spelling of 21314986 in words is "twenty-one million, three hundred fourteen thousand, nine hundred eighty-six".