20237684 has 12 divisors (see below), whose sum is σ = 37499364. Its totient is φ = 9523584.

The previous prime is 20237669. The next prime is 20237687. The reversal of 20237684 is 48673202.

It can be written as a sum of positive squares in 2 ways, for example, as 10061584 + 10176100 = 3172^2 + 3190^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20237684.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20237687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 148739 + ... + 148874.

It is an arithmetic number, because the mean of its divisors is an integer number (3124947).

Almost surely, 2^20237684 is an apocalyptic number.

It is an amenable number.

20237684 is a deficient number, since it is larger than the sum of its proper divisors (17261680).

20237684 is a wasteful number, since it uses less digits than its factorization.

20237684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 297634 (or 297632 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 32.

The square root of 20237684 is about 4498.6313474211. The cubic root of 20237684 is about 272.5128193055.

The spelling of 20237684 in words is "twenty million, two hundred thirty-seven thousand, six hundred eighty-four".