20806037 has 8 divisors (see below), whose sum is σ = 24264000. Its totient is φ = 17833452.

The previous prime is 20806003. The next prime is 20806039. The reversal of 20806037 is 73060802.

It is not a de Polignac number, because 20806037 - 2¹⁶ = 20740501 is a prime.

It is a Duffinian number.

It is a zygodrome in base 3.

It is a junction number, because it is equal to n+sod(n) for n = 20805997 and 20806015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20806039) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29987 + ... + 30672.

It is an arithmetic number, because the mean of its divisors is an integer number (3033000).

Almost surely, 2^20806037 is an apocalyptic number.

It is an amenable number.

20806037 is a deficient number, since it is larger than the sum of its proper divisors (3457963).

20806037 is an frugal number, since it uses more digits than its factorization.

20806037 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60680 (or 60666 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 20806037 is about 4561.3635022874. The cubic root of 20806037 is about 275.0403775423.

Adding to 20806037 its reverse (73060802), we get a palindrome (93866839).

The spelling of 20806037 in words is "twenty million, eight hundred six thousand, thirty-seven".