20414155 has 4 divisors (see below), whose sum is σ = 24496992. Its totient is φ = 16331320.

The previous prime is 20414129. The next prime is 20414171. The reversal of 20414155 is 55141402.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 20414155 - 2¹³ = 20405963 is a prime.

It is a Duffinian number.

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 3 ways as a sum of consecutive naturals, for example, 2041411 + ... + 2041420.

It is an arithmetic number, because the mean of its divisors is an integer number (6124248).

Almost surely, 2^20414155 is an apocalyptic number.

20414155 is a deficient number, since it is larger than the sum of its proper divisors (4082837).

20414155 is an equidigital number, since it uses as much as digits as its factorization.

20414155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4082836.

The product of its (nonzero) digits is 800, while the sum is 22.

The square root of 20414155 is about 4518.2026293649. The cubic root of 20414155 is about 273.3026247806.

Adding to 20414155 its reverse (55141402), we get a palindrome (75555557).

The spelling of 20414155 in words is "twenty million, four hundred fourteen thousand, one hundred fifty-five".