20498243 has 4 divisors (see below), whose sum is σ = 21704040. Its totient is φ = 19292448.

The previous prime is 20498239. The next prime is 20498249. The reversal of 20498243 is 34289402.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20498243 - 2² = 20498239 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20498249) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 602873 + ... + 602906.

It is an arithmetic number, because the mean of its divisors is an integer number (5426010).

Almost surely, 2^20498243 is an apocalyptic number.

20498243 is a deficient number, since it is larger than the sum of its proper divisors (1205797).

20498243 is a wasteful number, since it uses less digits than its factorization.

20498243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1205796.

The product of its (nonzero) digits is 13824, while the sum is 32.

The square root of 20498243 is about 4527.4985367198. The cubic root of 20498243 is about 273.6773645756.

The spelling of 20498243 in words is "twenty million, four hundred ninety-eight thousand, two hundred forty-three".