20937849 has 8 divisors (see below), whose sum is σ = 27985440. Its totient is φ = 13924416.

The previous prime is 20937827. The next prime is 20937853. The reversal of 20937849 is 94873902.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20937849 - 2¹⁷ = 20806777 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 20937849.

It is not an unprimeable number, because it can be changed into a prime (20937859) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7072 + ... + 9585.

It is an arithmetic number, because the mean of its divisors is an integer number (3498180).

Almost surely, 2^20937849 is an apocalyptic number.

It is an amenable number.

20937849 is a deficient number, since it is larger than the sum of its proper divisors (7047591).

20937849 is a wasteful number, since it uses less digits than its factorization.

20937849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17079.

The product of its (nonzero) digits is 108864, while the sum is 42.

The square root of 20937849 is about 4575.7894400857. The cubic root of 20937849 is about 275.6199742503.

The spelling of 20937849 in words is "twenty million, nine hundred thirty-seven thousand, eight hundred forty-nine".