20493198 has 96 divisors (see below), whose sum is σ = 51891840. Its totient is φ = 5785920.

The previous prime is 20493197. The next prime is 20493257. The reversal of 20493198 is 89139402.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20493197) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 246865 + ... + 246947.

It is an arithmetic number, because the mean of its divisors is an integer number (540540).

Almost surely, 2^20493198 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20493198, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25945920).

20493198 is an abundant number, since it is smaller than the sum of its proper divisors (31398642).

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

20493198 is a wasteful number, since it uses less digits than its factorization.

20493198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174 (or 171 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 20493198 is about 4526.9413515088. The cubic root of 20493198 is about 273.6549103651.

The spelling of 20493198 in words is "twenty million, four hundred ninety-three thousand, one hundred ninety-eight".