20194740 has 72 divisors (see below), whose sum is σ = 61746048. Its totient is φ = 5342400.

The previous prime is 20194729. The next prime is 20194747. The reversal of 20194740 is 4749102.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20194747) 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, 26809 + ... + 27551.

It is an arithmetic number, because the mean of its divisors is an integer number (857584).

Almost surely, 2^20194740 is an apocalyptic number.

20194740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20194740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30873024).

20194740 is an abundant number, since it is smaller than the sum of its proper divisors (41551308).

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

20194740 is a wasteful number, since it uses less digits than its factorization.

20194740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 909 (or 904 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 20194740 is about 4493.8558054303. The cubic root of 20194740 is about 272.3199270426.

The spelling of 20194740 in words is "twenty million, one hundred ninety-four thousand, seven hundred forty".