20098123 has 2 divisors, whose sum is σ = 20098124. Its totient is φ = 20098122.

The previous prime is 20098121. The next prime is 20098129. The reversal of 20098123 is 32189002.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20098123 - 2¹ = 20098121 is a prime.

Together with 20098121, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (20098121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10049061 + 10049062.

It is an arithmetic number, because the mean of its divisors is an integer number (10049062).

Almost surely, 2^20098123 is an apocalyptic number.

20098123 is a deficient number, since it is larger than the sum of its proper divisors (1).

20098123 is an equidigital number, since it uses as much as digits as its factorization.

20098123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 20098123 is about 4483.0930171033. The cubic root of 20098123 is about 271.8849489996.

The spelling of 20098123 in words is "twenty million, ninety-eight thousand, one hundred twenty-three".