20398242 has 8 divisors (see below), whose sum is σ = 40796496. Its totient is φ = 6799412.

The previous prime is 20398241. The next prime is 20398243. The reversal of 20398242 is 24289302.

It is an interprime number because it is at equal distance from previous prime (20398241) and next prime (20398243).

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

20398242 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (20398241) 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, 1699848 + ... + 1699859.

It is an arithmetic number, because the mean of its divisors is an integer number (5099562).

Almost surely, 2^20398242 is an apocalyptic number.

20398242 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20398242 is a wasteful number, since it uses less digits than its factorization.

20398242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3399712.

The product of its (nonzero) digits is 6912, while the sum is 30.

The square root of 20398242 is about 4516.4412981904. The cubic root of 20398242 is about 273.2315924471.

The spelling of 20398242 in words is "twenty million, three hundred ninety-eight thousand, two hundred forty-two".