20045205534 has 16 divisors (see below), whose sum is σ = 40186097280. Its totient is φ = 6665787480.

The previous prime is 20045205533. The next prime is 20045205539. The reversal of 20045205534 is 43550254002.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20045205533) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3984202 + ... + 3989229.

It is an arithmetic number, because the mean of its divisors is an integer number (2511631080).

Almost surely, 2^20045205534 is an apocalyptic number.

20045205534 is an abundant number, since it is smaller than the sum of its proper divisors (20140891746).

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

20045205534 is a wasteful number, since it uses less digits than its factorization.

20045205534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7973855.

The product of its (nonzero) digits is 24000, while the sum is 30.

Adding to 20045205534 its reverse (43550254002), we get a palindrome (63595459536).

The spelling of 20045205534 in words is "twenty billion, forty-five million, two hundred five thousand, five hundred thirty-four".