21386082 has 16 divisors (see below), whose sum is σ = 42823872. Its totient is φ = 7120080.

The previous prime is 21386047. The next prime is 21386117. The reversal of 21386082 is 28068312.

It is an interprime number because it is at equal distance from previous prime (21386047) and next prime (21386117).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5107 + ... + 8297.

It is an arithmetic number, because the mean of its divisors is an integer number (2676492).

Almost surely, 2^21386082 is an apocalyptic number.

21386082 is an abundant number, since it is smaller than the sum of its proper divisors (21437790).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21386082 is a wasteful number, since it uses less digits than its factorization.

21386082 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4313.

The product of its (nonzero) digits is 4608, while the sum is 30.

The square root of 21386082 is about 4624.5088387849. The cubic root of 21386082 is about 277.5729083650.

The spelling of 21386082 in words is "twenty-one million, three hundred eighty-six thousand, eighty-two".