20145434511 has 32 divisors (see below), whose sum is σ = 29455557120. Its totient is φ = 12208420224.

The previous prime is 20145434471. The next prime is 20145434521. The reversal of 20145434511 is 11543454102.

It is not a de Polignac number, because 20145434511 - 2¹³ = 20145426319 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20145434521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 18025 + ... + 201533.

It is an arithmetic number, because the mean of its divisors is an integer number (920486160).

Almost surely, 2^20145434511 is an apocalyptic number.

20145434511 is a deficient number, since it is larger than the sum of its proper divisors (9310122609).

20145434511 is a wasteful number, since it uses less digits than its factorization.

20145434511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183615.

The product of its (nonzero) digits is 9600, while the sum is 30.

Adding to 20145434511 its reverse (11543454102), we get a palindrome (31688888613).

The spelling of 20145434511 in words is "twenty billion, one hundred forty-five million, four hundred thirty-four thousand, five hundred eleven".