20042554 has 16 divisors (see below), whose sum is σ = 35467776. Its totient is φ = 8312400.

The previous prime is 20042551. The next prime is 20042557. The reversal of 20042554 is 45524002.

It is an interprime number because it is at equal distance from previous prime (20042551) and next prime (20042557).

It is not an unprimeable number, because it can be changed into a prime (20042551) 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 7 ways as a sum of consecutive naturals, for example, 22657 + ... + 23524.

It is an arithmetic number, because the mean of its divisors is an integer number (2216736).

Almost surely, 2^20042554 is an apocalyptic number.

20042554 is a deficient number, since it is larger than the sum of its proper divisors (15425222).

20042554 is a wasteful number, since it uses less digits than its factorization.

20042554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46221.

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

The square root of 20042554 is about 4476.8911087941. The cubic root of 20042554 is about 271.6341408276.

Adding to 20042554 its reverse (45524002), we get a palindrome (65566556).

The spelling of 20042554 in words is "twenty million, forty-two thousand, five hundred fifty-four".