20998103 has 8 divisors (see below), whose sum is σ = 25041408. Its totient is φ = 17215704.

The previous prime is 20998093. The next prime is 20998139. The reversal of 20998103 is 30189902.

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

It is a cyclic number.

It is not a de Polignac number, because 20998103 - 2¹⁶ = 20932567 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20998103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20998163) 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 7 ways as a sum of consecutive naturals, for example, 65051 + ... + 65372.

It is an arithmetic number, because the mean of its divisors is an integer number (3130176).

Almost surely, 2^20998103 is an apocalyptic number.

20998103 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

20998103 is a deficient number, since it is larger than the sum of its proper divisors (4043305).

20998103 is a wasteful number, since it uses less digits than its factorization.

20998103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130453.

The product of its (nonzero) digits is 3888, while the sum is 32.

The square root of 20998103 is about 4582.3687106124. The cubic root of 20998103 is about 275.8841099607.

The spelling of 20998103 in words is "twenty million, nine hundred ninety-eight thousand, one hundred three".