21108098 has 32 divisors (see below), whose sum is σ = 36096192. Its totient is φ = 9172800.

The previous prime is 21108097. The next prime is 21108103. The reversal of 21108098 is 89080112.

It is a self number, because there is not a number n which added to its sum of digits gives 21108098.

It is not an unprimeable number, because it can be changed into a prime (21108097) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49928 + ... + 50348.

It is an arithmetic number, because the mean of its divisors is an integer number (1128006).

Almost surely, 2^21108098 is an apocalyptic number.

21108098 is a deficient number, since it is larger than the sum of its proper divisors (14988094).

21108098 is a wasteful number, since it uses less digits than its factorization.

21108098 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 530.

The product of its (nonzero) digits is 1152, while the sum is 29.

The square root of 21108098 is about 4594.3550145804. The cubic root of 21108098 is about 276.3649952913.

The spelling of 21108098 in words is "twenty-one million, one hundred eight thousand, ninety-eight".