21016098 has 48 divisors (see below), whose sum is σ = 47882016. Its totient is φ = 6907680.

The previous prime is 21016057. The next prime is 21016103. The reversal of 21016098 is 89061012.

It is a super-3 number, since 3×21016098³ (a number of 23 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 40078 + ... + 40598.

It is an arithmetic number, because the mean of its divisors is an integer number (997542).

Almost surely, 2^21016098 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21016098, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23941008).

21016098 is an abundant number, since it is smaller than the sum of its proper divisors (26865918).

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

21016098 is an equidigital number, since it uses as much as digits as its factorization.

21016098 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 621 (or 609 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 27.

The square root of 21016098 is about 4584.3317942749. The cubic root of 21016098 is about 275.9628967137.

The spelling of 21016098 in words is "twenty-one million, sixteen thousand, ninety-eight".