21470098 has 12 divisors (see below), whose sum is σ = 34873578. Its totient is φ = 9909120.

The previous prime is 21470081. The next prime is 21470123. The reversal of 21470098 is 89007412.

It can be written as a sum of positive squares in 3 ways, for example, as 12271009 + 9199089 = 3503^2 + 3033^2 .

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 31423 + ... + 32098.

Almost surely, 2^21470098 is an apocalyptic number.

21470098 is a deficient number, since it is larger than the sum of its proper divisors (13403480).

21470098 is a wasteful number, since it uses less digits than its factorization.

21470098 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63549 (or 63536 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 21470098 is about 4633.5837102614. The cubic root of 21470098 is about 277.9359184975.

The spelling of 21470098 in words is "twenty-one million, four hundred seventy thousand, ninety-eight".