20194398 has 48 divisors (see below), whose sum is σ = 50633856. Its totient is φ = 5697360.

The previous prime is 20194387. The next prime is 20194399. The reversal of 20194398 is 89349102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20194399) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9493 + ... + 11423.

It is an arithmetic number, because the mean of its divisors is an integer number (1054872).

Almost surely, 2^20194398 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20194398, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25316928).

20194398 is an abundant number, since it is smaller than the sum of its proper divisors (30439458).

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

20194398 is a wasteful number, since it uses less digits than its factorization.

20194398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2029 (or 2026 counting only the distinct ones).

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

The square root of 20194398 is about 4493.8177533140. The cubic root of 20194398 is about 272.3183897786.

The spelling of 20194398 in words is "twenty million, one hundred ninety-four thousand, three hundred ninety-eight".