20202103213 has 4 divisors (see below), whose sum is σ = 20335892128. Its totient is φ = 20068314300.

The previous prime is 20202103189. The next prime is 20202103223. The reversal of 20202103213 is 31230120202.

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, and also an emirpimes, since its reverse is a distinct semiprime: 31230120202 = 2 ⋅15615060101.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20202103213 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 (20202103223) 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, 66894231 + ... + 66894532.

It is an arithmetic number, because the mean of its divisors is an integer number (5083973032).

Almost surely, 2^20202103213 is an apocalyptic number.

It is an amenable number.

20202103213 is a deficient number, since it is larger than the sum of its proper divisors (133788915).

20202103213 is a wasteful number, since it uses less digits than its factorization.

20202103213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133788914.

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

Adding to 20202103213 its reverse (31230120202), we get a palindrome (51432223415).

The spelling of 20202103213 in words is "twenty billion, two hundred two million, one hundred three thousand, two hundred thirteen".