20143213 has 4 divisors (see below), whose sum is σ = 20571840. Its totient is φ = 19714588.

The previous prime is 20143171. The next prime is 20143219. The reversal of 20143213 is 31234102.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20143213 - 2⁹ = 20142701 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 (20143219) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 214243 + ... + 214336.

It is an arithmetic number, because the mean of its divisors is an integer number (5142960).

Almost surely, 2^20143213 is an apocalyptic number.

It is an amenable number.

20143213 is a deficient number, since it is larger than the sum of its proper divisors (428627).

20143213 is an equidigital number, since it uses as much as digits as its factorization.

20143213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 428626.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 20143213 is about 4488.1190937853. The cubic root of 20143213 is about 272.0881211379.

Adding to 20143213 its reverse (31234102), we get a palindrome (51377315).

It can be divided in two parts, 201432 and 13, that multiplied together give a triangular number (2618616 = T₂₂₈₈).

The spelling of 20143213 in words is "twenty million, one hundred forty-three thousand, two hundred thirteen".