20560631 has 8 divisors (see below), whose sum is σ = 25305504. Its totient is φ = 16267680.

The previous prime is 20560601. The next prime is 20560649. The reversal of 20560631 is 13606502.

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

It is not a de Polignac number, because 20560631 - 2¹⁰ = 20559607 is a prime.

It is a super-2 number, since 2×20560631² = 845479094236322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20560597 and 20560606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20560601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 112880 + ... + 113061.

It is an arithmetic number, because the mean of its divisors is an integer number (3163188).

Almost surely, 2^20560631 is an apocalyptic number.

20560631 is a deficient number, since it is larger than the sum of its proper divisors (4744873).

20560631 is a wasteful number, since it uses less digits than its factorization.

20560631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 225961.

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 20560631 is about 4534.3831995102. The cubic root of 20560631 is about 273.9547361605.

The spelling of 20560631 in words is "twenty million, five hundred sixty thousand, six hundred thirty-one".