20036231 has 4 divisors (see below), whose sum is σ = 20052912. Its totient is φ = 20019552.

The previous prime is 20036227. The next prime is 20036239. The reversal of 20036231 is 13263002.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13263002 = 2 ⋅6631501.

It is a cyclic number.

It is not a de Polignac number, because 20036231 - 2² = 20036227 is a prime.

It is a super-2 number, since 2×20036231² = 802901105370722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20036239) 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, 6386 + ... + 8991.

It is an arithmetic number, because the mean of its divisors is an integer number (5013228).

Almost surely, 2^20036231 is an apocalyptic number.

20036231 is a deficient number, since it is larger than the sum of its proper divisors (16681).

20036231 is a wasteful number, since it uses less digits than its factorization.

20036231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16680.

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 20036231 is about 4476.1848710705. The cubic root of 20036231 is about 271.6055728896.

Adding to 20036231 its reverse (13263002), we get a palindrome (33299233).

The spelling of 20036231 in words is "twenty million, thirty-six thousand, two hundred thirty-one".