20431036 has 6 divisors (see below), whose sum is σ = 35754320. Its totient is φ = 10215516.

The previous prime is 20431027. The next prime is 20431039. The reversal of 20431036 is 63013402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20431039) 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 as a sum of consecutive naturals, namely, 2553876 + ... + 2553883.

Almost surely, 2^20431036 is an apocalyptic number.

It is an amenable number.

20431036 is a deficient number, since it is larger than the sum of its proper divisors (15323284).

20431036 is a wasteful number, since it uses less digits than its factorization.

20431036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5107763 (or 5107761 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 20431036 is about 4520.0703534348. The cubic root of 20431036 is about 273.3779377270.

Adding to 20431036 its reverse (63013402), we get a palindrome (83444438).

It can be divided in two parts, 20 and 431036, that added together give a triangular number (431056 = T₉₂₈).

The spelling of 20431036 in words is "twenty million, four hundred thirty-one thousand, thirty-six".