20817098 has 8 divisors (see below), whose sum is σ = 31355940. Its totient is φ = 10365120.

The previous prime is 20817091. The next prime is 20817107. The reversal of 20817098 is 89071802.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 20133169 + 683929 = 4487^2 + 827^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (20817091) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 21113 + ... + 22076.

Almost surely, 2^20817098 is an apocalyptic number.

20817098 is a deficient number, since it is larger than the sum of its proper divisors (10538842).

20817098 is a wasteful number, since it uses less digits than its factorization.

20817098 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43432.

The product of its (nonzero) digits is 8064, while the sum is 35.

The square root of 20817098 is about 4562.5758075894. The cubic root of 20817098 is about 275.0891083132.

The spelling of 20817098 in words is "twenty million, eight hundred seventeen thousand, ninety-eight".