20671037 has 4 divisors (see below), whose sum is σ = 20769216. Its totient is φ = 20572860.

The previous prime is 20671033. The next prime is 20671073. The reversal of 20671037 is 73017602.

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.

It is a cyclic number.

It is not a de Polignac number, because 20671037 - 2² = 20671033 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20670997 and 20671015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20671033) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48773 + ... + 49194.

It is an arithmetic number, because the mean of its divisors is an integer number (5192304).

Almost surely, 2^20671037 is an apocalyptic number.

It is an amenable number.

20671037 is a deficient number, since it is larger than the sum of its proper divisors (98179).

20671037 is an equidigital number, since it uses as much as digits as its factorization.

20671037 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98178.

The product of its (nonzero) digits is 1764, while the sum is 26.

The square root of 20671037 is about 4546.5412128342. The cubic root of 20671037 is about 274.4442196626. Note that the first 3 decimals are identical.

Adding to 20671037 its reverse (73017602), we get a palindrome (93688639).

The spelling of 20671037 in words is "twenty million, six hundred seventy-one thousand, thirty-seven".