20133045 has 12 divisors (see below), whose sum is σ = 34897356. Its totient is φ = 10737600.

The previous prime is 20133041. The next prime is 20133053. The reversal of 20133045 is 54033102.

It can be written as a sum of positive squares in 2 ways, for example, as 8803089 + 11329956 = 2967^2 + 3366^2 .

It is not a de Polignac number, because 20133045 - 2² = 20133041 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20133041) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 223656 + ... + 223745.

It is an arithmetic number, because the mean of its divisors is an integer number (2908113).

Almost surely, 2^20133045 is an apocalyptic number.

It is an amenable number.

20133045 is a deficient number, since it is larger than the sum of its proper divisors (14764311).

20133045 is a wasteful number, since it uses less digits than its factorization.

20133045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 447412 (or 447409 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 18.

The square root of 20133045 is about 4486.9861822832. The cubic root of 20133045 is about 272.0423313946.

Subtracting from 20133045 its product of nonzero digits (360), we obtain a triangular number (20132685 = T₆₃₄₅).

Adding to 20133045 its reverse (54033102), we get a palindrome (74166147).

The spelling of 20133045 in words is "twenty million, one hundred thirty-three thousand, forty-five".