20668037 has 4 divisors (see below), whose sum is σ = 22257900. Its totient is φ = 19078176.

The previous prime is 20668027. The next prime is 20668051. The reversal of 20668037 is 73086602.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6522916 + 14145121 = 2554^2 + 3761^2 .

It is not a de Polignac number, because 20668037 - 2⁶ = 20667973 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20667994 and 20668012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20668027) 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, 794912 + ... + 794937.

It is an arithmetic number, because the mean of its divisors is an integer number (5564475).

Almost surely, 2^20668037 is an apocalyptic number.

It is an amenable number.

20668037 is a deficient number, since it is larger than the sum of its proper divisors (1589863).

20668037 is a wasteful number, since it uses less digits than its factorization.

20668037 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1589862.

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 20668037 is about 4546.2112797361. The cubic root of 20668037 is about 274.4309422689.

The spelling of 20668037 in words is "twenty million, six hundred sixty-eight thousand, thirty-seven".