20542044 has 24 divisors (see below), whose sum is σ = 48358800. Its totient is φ = 6786304.

The previous prime is 20542009. The next prime is 20542051. The reversal of 20542044 is 44024502.

It is a self number, because there is not a number n which added to its sum of digits gives 20542044.

It is a congruent number.

It is an unprimeable number.

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, 6219 + ... + 8930.

It is an arithmetic number, because the mean of its divisors is an integer number (2014950).

Almost surely, 2^20542044 is an apocalyptic number.

It is an amenable number.

20542044 is an abundant number, since it is smaller than the sum of its proper divisors (27816756).

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

20542044 is a wasteful number, since it uses less digits than its factorization.

20542044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15269 (or 15267 counting only the distinct ones).

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

The square root of 20542044 is about 4532.3331739845. Note that the first 3 decimals coincide. The cubic root of 20542044 is about 273.8721587361.

Adding to 20542044 its reverse (44024502), we get a palindrome (64566546).

The spelling of 20542044 in words is "twenty million, five hundred forty-two thousand, forty-four".