20413143 has 12 divisors (see below), whose sum is σ = 29531320. Its totient is φ = 13587696.

The previous prime is 20413117. The next prime is 20413147. The reversal of 20413143 is 34131402.

It is a de Polignac number, because none of the positive numbers 2^k-20413143 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20413147) 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 11 ways as a sum of consecutive naturals, for example, 6348 + ... + 9006.

Almost surely, 2^20413143 is an apocalyptic number.

20413143 is a deficient number, since it is larger than the sum of its proper divisors (9118177).

20413143 is a wasteful number, since it uses less digits than its factorization.

20413143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3518 (or 3515 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 20413143 is about 4518.0906365411. The cubic root of 20413143 is about 273.2981085217.

Subtracting from 20413143 its product of nonzero digits (288), we obtain a triangular number (20412855 = T₆₃₈₉).

Adding to 20413143 its reverse (34131402), we get a palindrome (54544545).

It can be divided in two parts, 2041 and 3143, that added together give a square (5184 = 72²).

The spelling of 20413143 in words is "twenty million, four hundred thirteen thousand, one hundred forty-three".