20042355 has 16 divisors (see below), whose sum is σ = 32430240. Its totient is φ = 10568448.

The previous prime is 20042353. The next prime is 20042357. The reversal of 20042355 is 55324002.

It is an interprime number because it is at equal distance from previous prime (20042353) and next prime (20042357).

It is not a de Polignac number, because 20042355 - 2¹ = 20042353 is a prime.

It is a zygodrome in base 7.

It is not an unprimeable number, because it can be changed into a prime (20042353) 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, 6172 + ... + 8841.

It is an arithmetic number, because the mean of its divisors is an integer number (2026890).

Almost surely, 2^20042355 is an apocalyptic number.

20042355 is a deficient number, since it is larger than the sum of its proper divisors (12387885).

20042355 is a wasteful number, since it uses less digits than its factorization.

20042355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15110.

The product of its (nonzero) digits is 1200, while the sum is 21.

The square root of 20042355 is about 4476.8688834944. The cubic root of 20042355 is about 271.6332418176.

Adding to 20042355 its reverse (55324002), we get a palindrome (75366357).

The spelling of 20042355 in words is "twenty million, forty-two thousand, three hundred fifty-five".