20203111445 has 64 divisors (see below), whose sum is σ = 28527206400. Its totient is φ = 13578140160.

The previous prime is 20203111417. The next prime is 20203111501. The reversal of 20203111445 is 54411130202.

It is not a de Polignac number, because 20203111445 - 2⁸ = 20203111189 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20203111445.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 21561017 + ... + 21561953.

It is an arithmetic number, because the mean of its divisors is an integer number (445737600).

Almost surely, 2^20203111445 is an apocalyptic number.

It is an amenable number.

20203111445 is a deficient number, since it is larger than the sum of its proper divisors (8324094955).

20203111445 is a wasteful number, since it uses less digits than its factorization.

20203111445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1458.

The product of its (nonzero) digits is 960, while the sum is 23.

Adding to 20203111445 its reverse (54411130202), we get a palindrome (74614241647).

The spelling of 20203111445 in words is "twenty billion, two hundred three million, one hundred eleven thousand, four hundred forty-five".