20847198 has 8 divisors (see below), whose sum is σ = 41694408. Its totient is φ = 6949064.

The previous prime is 20847191. The next prime is 20847227. The reversal of 20847198 is 89174802.

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

20847198 is an admirable number.

It is a super-3 number, since 3×20847198³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20847191) 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, 1737261 + ... + 1737272.

It is an arithmetic number, because the mean of its divisors is an integer number (5211801).

Almost surely, 2^20847198 is an apocalyptic number.

20847198 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.

20847198 is a wasteful number, since it uses less digits than its factorization.

20847198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3474538.

The product of its (nonzero) digits is 32256, while the sum is 39.

The square root of 20847198 is about 4565.8731914060. The cubic root of 20847198 is about 275.2216306996.

The spelling of 20847198 in words is "twenty million, eight hundred forty-seven thousand, one hundred ninety-eight".