20637065 has 8 divisors (see below), whose sum is σ = 26221320. Its totient is φ = 15538432.

The previous prime is 20637047. The next prime is 20637101. The reversal of 20637065 is 56073602.

It can be written as a sum of positive squares in 4 ways, for example, as 674041 + 19963024 = 821^2 + 4468^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20637065 is a prime.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 121310 + ... + 121479.

It is an arithmetic number, because the mean of its divisors is an integer number (3277665).

Almost surely, 2^20637065 is an apocalyptic number.

It is an amenable number.

20637065 is a deficient number, since it is larger than the sum of its proper divisors (5584255).

20637065 is a wasteful number, since it uses less digits than its factorization.

20637065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242811.

The product of its (nonzero) digits is 7560, while the sum is 29.

The square root of 20637065 is about 4542.8036497300. The cubic root of 20637065 is about 274.2937912919.

The spelling of 20637065 in words is "twenty million, six hundred thirty-seven thousand, sixty-five".