20140072 has 8 divisors (see below), whose sum is σ = 37762650. Its totient is φ = 10070032.

The previous prime is 20140069. The next prime is 20140079. The reversal of 20140072 is 27004102.

It can be written as a sum of positive squares in only one way, i.e., 20124196 + 15876 = 4486^2 + 126^2 .

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

It is not an unprimeable number, because it can be changed into a prime (20140079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1258747 + ... + 1258762.

Almost surely, 2^20140072 is an apocalyptic number.

It is an amenable number.

20140072 is a deficient number, since it is larger than the sum of its proper divisors (17622578).

20140072 is a wasteful number, since it uses less digits than its factorization.

20140072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2517515 (or 2517511 counting only the distinct ones).

The product of its (nonzero) digits is 112, while the sum is 16.

The square root of 20140072 is about 4487.7691562735. The cubic root of 20140072 is about 272.0739778594.

Adding to 20140072 its reverse (27004102), we get a palindrome (47144174).

The spelling of 20140072 in words is "twenty million, one hundred forty thousand, seventy-two".