21086002 has 16 divisors (see below), whose sum is σ = 36224640. Its totient is φ = 9017568.

The previous prime is 21085993. The next prime is 21086003. The reversal of 21086002 is 20068012.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (21086003) 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, 6643 + ... + 9289.

It is an arithmetic number, because the mean of its divisors is an integer number (2264040).

Almost surely, 2^21086002 is an apocalyptic number.

21086002 is a deficient number, since it is larger than the sum of its proper divisors (15138638).

21086002 is a wasteful number, since it uses less digits than its factorization.

21086002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3225.

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 21086002 is about 4591.9496948464. The cubic root of 21086002 is about 276.2685284761.

The spelling of 21086002 in words is "twenty-one million, eighty-six thousand, two".