20227631 has 4 divisors (see below), whose sum is σ = 20262000. Its totient is φ = 20193264.

The previous prime is 20227607. The next prime is 20227633. The reversal of 20227631 is 13672202.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13672202 = 2 ⋅6836101.

It is a cyclic number.

It is not a de Polignac number, because 20227631 - 2¹⁸ = 19965487 is a prime.

It is a super-2 number, since 2×20227631² = 818314111744322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20227597 and 20227606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20227633) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 16286 + ... + 17483.

It is an arithmetic number, because the mean of its divisors is an integer number (5065500).

Almost surely, 2^20227631 is an apocalyptic number.

20227631 is a deficient number, since it is larger than the sum of its proper divisors (34369).

20227631 is an equidigital number, since it uses as much as digits as its factorization.

20227631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34368.

The product of its (nonzero) digits is 1008, while the sum is 23.

The square root of 20227631 is about 4497.5138687946. The cubic root of 20227631 is about 272.4676885629.

Adding to 20227631 its reverse (13672202), we get a palindrome (33899833).

The spelling of 20227631 in words is "twenty million, two hundred twenty-seven thousand, six hundred thirty-one".