20653144 has 8 divisors (see below), whose sum is σ = 38724660. Its totient is φ = 10326568.

The previous prime is 20653117. The next prime is 20653151. The reversal of 20653144 is 44135602.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1290814 + ... + 1290829.

Almost surely, 2^20653144 is an apocalyptic number.

It is an amenable number.

20653144 is a deficient number, since it is larger than the sum of its proper divisors (18071516).

20653144 is a wasteful number, since it uses less digits than its factorization.

20653144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2581649 (or 2581645 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 20653144 is about 4544.5730272491. The cubic root of 20653144 is about 274.3650098323.

Adding to 20653144 its reverse (44135602), we get a palindrome (64788746).

The spelling of 20653144 in words is "twenty million, six hundred fifty-three thousand, one hundred forty-four".