20105040534 has 16 divisors (see below), whose sum is σ = 40325300400. Its totient is φ = 6682476960.

The previous prime is 20105040533. The next prime is 20105040559. The reversal of 20105040534 is 43504050102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20105040533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4798537 + ... + 4802724.

It is an arithmetic number, because the mean of its divisors is an integer number (2520331275).

Almost surely, 2^20105040534 is an apocalyptic number.

20105040534 is an abundant number, since it is smaller than the sum of its proper divisors (20220259866).

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

20105040534 is a wasteful number, since it uses less digits than its factorization.

20105040534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9601615.

The product of its (nonzero) digits is 2400, while the sum is 24.

Adding to 20105040534 its reverse (43504050102), we get a palindrome (63609090636).

The spelling of 20105040534 in words is "twenty billion, one hundred five million, forty thousand, five hundred thirty-four".