20440546 has 12 divisors (see below), whose sum is σ = 35666838. Its totient is φ = 8760192.

The previous prime is 20440517. The next prime is 20440549. The reversal of 20440546 is 64504402.

It can be written as a sum of positive squares in only one way, i.e., 19263321 + 1177225 = 4389^2 + 1085^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20440546.

It is not an unprimeable number, because it can be changed into a prime (20440549) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 104191 + ... + 104386.

Almost surely, 2^20440546 is an apocalyptic number.

20440546 is a deficient number, since it is larger than the sum of its proper divisors (15226292).

20440546 is a wasteful number, since it uses less digits than its factorization.

20440546 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208593 (or 208586 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 25.

The square root of 20440546 is about 4521.1222058246. The cubic root of 20440546 is about 273.4203474040.

Adding to 20440546 its reverse (64504402), we get a palindrome (84944948).

The spelling of 20440546 in words is "twenty million, four hundred forty thousand, five hundred forty-six".