20544426 has 36 divisors (see below), whose sum is σ = 51782562. Its totient is φ = 5869584.

The previous prime is 20544397. The next prime is 20544427. The reversal of 20544426 is 62444502.

It can be written as a sum of positive squares in only one way, i.e., 20385225 + 159201 = 4515^2 + 399^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20544426.

It is not an unprimeable number, because it can be changed into a prime (20544427) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 10765 + ... + 12528.

Almost surely, 2^20544426 is an apocalyptic number.

20544426 is an abundant number, since it is smaller than the sum of its proper divisors (31238136).

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

20544426 is a wasteful number, since it uses less digits than its factorization.

20544426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23315 (or 23305 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 27.

The square root of 20544426 is about 4532.5959449305. The cubic root of 20544426 is about 273.8827441525.

Adding to 20544426 its reverse (62444502), we get a palindrome (82988928).

It can be divided in two parts, 20 and 544426, that added together give a triangular number (544446 = T₁₀₄₃).

The spelling of 20544426 in words is "twenty million, five hundred forty-four thousand, four hundred twenty-six".