20042454 has 16 divisors (see below), whose sum is σ = 42194880. Its totient is φ = 6329160.

The previous prime is 20042443. The next prime is 20042459. The reversal of 20042454 is 45424002.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 20042454.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20042459) 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, 87792 + ... + 88019.

It is an arithmetic number, because the mean of its divisors is an integer number (2637180).

Almost surely, 2^20042454 is an apocalyptic number.

20042454 is an abundant number, since it is smaller than the sum of its proper divisors (22152426).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20042454 is a wasteful number, since it uses less digits than its factorization.

20042454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175835.

The product of its (nonzero) digits is 1280, while the sum is 21.

The square root of 20042454 is about 4476.8799403156. The cubic root of 20042454 is about 271.6336890645.

Adding to 20042454 its reverse (45424002), we get a palindrome (65466456).

The spelling of 20042454 in words is "twenty million, forty-two thousand, four hundred fifty-four".