20145434444 has 24 divisors (see below), whose sum is σ = 36800668800. Its totient is φ = 9638259840.

The previous prime is 20145434417. The next prime is 20145434471. The reversal of 20145434444 is 44443454102.

It is an interprime number because it is at equal distance from previous prime (20145434417) and next prime (20145434471).

It is an unprimeable number.

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, 901679 + ... + 923750.

It is an arithmetic number, because the mean of its divisors is an integer number (1533361200).

Almost surely, 2^20145434444 is an apocalyptic number.

It is an amenable number.

20145434444 is a deficient number, since it is larger than the sum of its proper divisors (16655234356).

20145434444 is a wasteful number, since it uses less digits than its factorization.

20145434444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1825553 (or 1825551 counting only the distinct ones).

The product of its (nonzero) digits is 122880, while the sum is 35.

Adding to 20145434444 its reverse (44443454102), we get a palindrome (64588888546).

The spelling of 20145434444 in words is "twenty billion, one hundred forty-five million, four hundred thirty-four thousand, four hundred forty-four".