20331037 has 4 divisors (see below), whose sum is σ = 20354080. Its totient is φ = 20307996.

The previous prime is 20331023. The next prime is 20331043. The reversal of 20331037 is 73013302.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 73013302 = 2 ⋅36506651.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20331037 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20301037) 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, 10143 + ... + 11980.

It is an arithmetic number, because the mean of its divisors is an integer number (5088520).

Almost surely, 2^20331037 is an apocalyptic number.

It is an amenable number.

20331037 is a deficient number, since it is larger than the sum of its proper divisors (23043).

20331037 is an equidigital number, since it uses as much as digits as its factorization.

20331037 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23042.

The product of its (nonzero) digits is 378, while the sum is 19.

The square root of 20331037 is about 4508.9951208667. The cubic root of 20331037 is about 272.9311951191.

Adding to 20331037 its reverse (73013302), we get a palindrome (93344339).

The spelling of 20331037 in words is "twenty million, three hundred thirty-one thousand, thirty-seven".