20272144 has 10 divisors (see below), whose sum is σ = 39277310. Its totient is φ = 10136064.

The previous prime is 20272117. The next prime is 20272157. The reversal of 20272144 is 44127202.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 12873744 + 7398400 = 3588^2 + 2720^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 633489 + ... + 633520.

It is an arithmetic number, because the mean of its divisors is an integer number (3927731).

Almost surely, 2^20272144 is an apocalyptic number.

It is an amenable number.

20272144 is a deficient number, since it is larger than the sum of its proper divisors (19005166).

20272144 is a wasteful number, since it uses less digits than its factorization.

20272144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1267017 (or 1267011 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 22.

The square root of 20272144 is about 4502.4597721690. The cubic root of 20272144 is about 272.6674066039.

Adding to 20272144 its reverse (44127202), we get a palindrome (64399346).

The spelling of 20272144 in words is "twenty million, two hundred seventy-two thousand, one hundred forty-four".