20145434445 has 24 divisors (see below), whose sum is σ = 35057891232. Its totient is φ = 10701420000.

The previous prime is 20145434417. The next prime is 20145434471. The reversal of 20145434445 is 54443454102.

20145434445 is a `hidden beast` number, since 20 + 14 + 543 + 44 + 45 = 666.

It is not a de Polignac number, because 20145434445 - 2⁷ = 20145434317 is a prime.

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, 880491 + ... + 903080.

It is an arithmetic number, because the mean of its divisors is an integer number (1460745468).

Almost surely, 2^20145434445 is an apocalyptic number.

It is an amenable number.

20145434445 is a deficient number, since it is larger than the sum of its proper divisors (14912456787).

20145434445 is a wasteful number, since it uses less digits than its factorization.

20145434445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1783833 (or 1783830 counting only the distinct ones).

The product of its (nonzero) digits is 153600, while the sum is 36.

Adding to 20145434445 its reverse (54443454102), we get a palindrome (74588888547).

The spelling of 20145434445 in words is "twenty billion, one hundred forty-five million, four hundred thirty-four thousand, four hundred forty-five".