20298239 has 8 divisors (see below), whose sum is σ = 22393392. Its totient is φ = 18279360.

The previous prime is 20298233. The next prime is 20298241. The reversal of 20298239 is 93289202.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20298239 is a prime.

It is a super-2 number, since 2×20298239² = 824037013002242, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20298199 and 20298208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20298233) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18509 + ... + 19574.

It is an arithmetic number, because the mean of its divisors is an integer number (2799174).

Almost surely, 2^20298239 is an apocalyptic number.

20298239 is a deficient number, since it is larger than the sum of its proper divisors (2095153).

20298239 is a wasteful number, since it uses less digits than its factorization.

20298239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38137.

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 20298239 is about 4505.3567006398. The cubic root of 20298239 is about 272.7843520564.

The spelling of 20298239 in words is "twenty million, two hundred ninety-eight thousand, two hundred thirty-nine".