20194518456 has 128 divisors (see below), whose sum is σ = 64216128000. Its totient is φ = 5760274176.

The previous prime is 20194518451. The next prime is 20194518457. The reversal of 20194518456 is 65481549102.

20194518456 is a `hidden beast` number, since 2 + 0 + 1 + 94 + 518 + 45 + 6 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20194518451) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 925140 + ... + 946716.

It is an arithmetic number, because the mean of its divisors is an integer number (501688500).

Almost surely, 2^20194518456 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20194518456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32108064000).

20194518456 is an abundant number, since it is smaller than the sum of its proper divisors (44021609544).

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

20194518456 is a wasteful number, since it uses less digits than its factorization.

20194518456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22218 (or 22208 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 45.

The spelling of 20194518456 in words is "twenty billion, one hundred ninety-four million, five hundred eighteen thousand, four hundred fifty-six".