20545244 has 6 divisors (see below), whose sum is σ = 35954184. Its totient is φ = 10272620.

The previous prime is 20545243. The next prime is 20545247. The reversal of 20545244 is 44254502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20545243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2568152 + ... + 2568159.

It is an arithmetic number, because the mean of its divisors is an integer number (5992364).

Almost surely, 2^20545244 is an apocalyptic number.

It is an amenable number.

20545244 is a deficient number, since it is larger than the sum of its proper divisors (15408940).

20545244 is a wasteful number, since it uses less digits than its factorization.

20545244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5136315 (or 5136313 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 26.

The square root of 20545244 is about 4532.6861792981. The cubic root of 20545244 is about 273.8863790900.

Adding to 20545244 its reverse (44254502), we get a palindrome (64799746).

The spelling of 20545244 in words is "twenty million, five hundred forty-five thousand, two hundred forty-four".