20043155 has 16 divisors (see below), whose sum is σ = 26335584. Its totient is φ = 14522880.

The previous prime is 20043151. The next prime is 20043161. The reversal of 20043155 is 55134002.

It is not a de Polignac number, because 20043155 - 2² = 20043151 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20043151) 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 15 ways as a sum of consecutive naturals, for example, 20027 + ... + 21003.

It is an arithmetic number, because the mean of its divisors is an integer number (1645974).

Almost surely, 2^20043155 is an apocalyptic number.

20043155 is a deficient number, since it is larger than the sum of its proper divisors (6292429).

20043155 is a wasteful number, since it uses less digits than its factorization.

20043155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1366.

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 20043155 is about 4476.9582307634. The cubic root of 20043155 is about 271.6368558922.

Adding to 20043155 its reverse (55134002), we get a palindrome (75177157).

The spelling of 20043155 in words is "twenty million, forty-three thousand, one hundred fifty-five".