20145434512 has 20 divisors (see below), whose sum is σ = 44607748096. Its totient is φ = 8633757600.

The previous prime is 20145434471. The next prime is 20145434521. The reversal of 20145434512 is 21543454102.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 89934864 + ... + 89935087.

Almost surely, 2^20145434512 is an apocalyptic number.

It is an amenable number.

20145434512 is an abundant number, since it is smaller than the sum of its proper divisors (24462313584).

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

20145434512 is a wasteful number, since it uses less digits than its factorization.

20145434512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179869966 (or 179869960 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 31.

Adding to 20145434512 its reverse (21543454102), we get a palindrome (41688888614).

The spelling of 20145434512 in words is "twenty billion, one hundred forty-five million, four hundred thirty-four thousand, five hundred twelve".