20055442 has 16 divisors (see below), whose sum is σ = 32895072. Its totient is φ = 9094720.

The previous prime is 20055433. The next prime is 20055463. The reversal of 20055442 is 24455002.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12138 + ... + 13690.

It is an arithmetic number, because the mean of its divisors is an integer number (2055942).

Almost surely, 2^20055442 is an apocalyptic number.

20055442 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20055442 is a deficient number, since it is larger than the sum of its proper divisors (12839630).

20055442 is a wasteful number, since it uses less digits than its factorization.

20055442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2153.

The product of its (nonzero) digits is 1600, while the sum is 22.

The square root of 20055442 is about 4478.3302691963. The cubic root of 20055442 is about 271.6923514844.

It can be divided in two parts, 2005 and 5442, that added together give a palindrome (7447).

The spelling of 20055442 in words is "twenty million, fifty-five thousand, four hundred forty-two".