20194516764 has 72 divisors (see below), whose sum is σ = 53755621920. Its totient is φ = 6379731072.

The previous prime is 20194516759. The next prime is 20194516789. The reversal of 20194516764 is 46761549102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21627 + ... + 202130.

It is an arithmetic number, because the mean of its divisors is an integer number (746605860).

Almost surely, 2^20194516764 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 20194516764, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26877810960).

20194516764 is an abundant number, since it is smaller than the sum of its proper divisors (33561105156).

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

20194516764 is a wasteful number, since it uses less digits than its factorization.

20194516764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 223899 (or 223894 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 45.

The spelling of 20194516764 in words is "twenty billion, one hundred ninety-four million, five hundred sixteen thousand, seven hundred sixty-four".