20447037 has 12 divisors (see below), whose sum is σ = 31806684. Its totient is φ = 12582720.

The previous prime is 20447003. The next prime is 20447057. The reversal of 20447037 is 73074402.

It can be written as a sum of positive squares in 2 ways, for example, as 1602756 + 18844281 = 1266^2 + 4341^2 .

It is not a de Polignac number, because 20447037 - 2¹¹ = 20444989 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20447037.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20447057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 87264 + ... + 87497.

It is an arithmetic number, because the mean of its divisors is an integer number (2650557).

Almost surely, 2^20447037 is an apocalyptic number.

It is an amenable number.

20447037 is a deficient number, since it is larger than the sum of its proper divisors (11359647).

20447037 is a wasteful number, since it uses less digits than its factorization.

20447037 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174780 (or 174777 counting only the distinct ones).

The product of its (nonzero) digits is 4704, while the sum is 27.

The square root of 20447037 is about 4521.8400015923. The cubic root of 20447037 is about 273.4492863513.

The spelling of 20447037 in words is "twenty million, four hundred forty-seven thousand, thirty-seven".