21058098 has 16 divisors (see below), whose sum is σ = 42293856. Its totient is φ = 6989760.

The previous prime is 21058067. The next prime is 21058111. The reversal of 21058098 is 89085012.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5836 + ... + 8727.

It is an arithmetic number, because the mean of its divisors is an integer number (2643366).

Almost surely, 2^21058098 is an apocalyptic number.

21058098 is an abundant number, since it is smaller than the sum of its proper divisors (21235758).

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

21058098 is a wasteful number, since it uses less digits than its factorization.

21058098 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14809.

The product of its (nonzero) digits is 5760, while the sum is 33.

The square root of 21058098 is about 4588.9103281716. The cubic root of 21058098 is about 276.1466087294.

The spelling of 21058098 in words is "twenty-one million, fifty-eight thousand, ninety-eight".