21066098 has 16 divisors (see below), whose sum is σ = 34163520. Its totient is φ = 9708336.

The previous prime is 21066049. The next prime is 21066107. The reversal of 21066098 is 89066012.

It is a Curzon number.

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, 6086 + ... + 8897.

It is an arithmetic number, because the mean of its divisors is an integer number (2135220).

Almost surely, 2^21066098 is an apocalyptic number.

21066098 is a deficient number, since it is larger than the sum of its proper divisors (13097422).

21066098 is a wasteful number, since it uses less digits than its factorization.

21066098 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15041.

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 21066098 is about 4589.7819120302. The cubic root of 21066098 is about 276.1815737925.

The spelling of 21066098 in words is "twenty-one million, sixty-six thousand, ninety-eight".