20203112145 has 16 divisors (see below), whose sum is σ = 33367721472. Its totient is φ = 10427412480.

The previous prime is 20203112143. The next prime is 20203112191. The reversal of 20203112145 is 54121130202.

It is not a de Polignac number, because 20203112145 - 2¹ = 20203112143 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20203112143) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21723312 + ... + 21724241.

It is an arithmetic number, because the mean of its divisors is an integer number (2085482592).

Almost surely, 2^20203112145 is an apocalyptic number.

It is an amenable number.

20203112145 is a deficient number, since it is larger than the sum of its proper divisors (13164609327).

20203112145 is a wasteful number, since it uses less digits than its factorization.

20203112145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43447592.

The product of its (nonzero) digits is 480, while the sum is 21.

Adding to 20203112145 its reverse (54121130202), we get a palindrome (74324242347).

The spelling of 20203112145 in words is "twenty billion, two hundred three million, one hundred twelve thousand, one hundred forty-five".