20213131233133 has 4 divisors (see below), whose sum is σ = 20255329837440. Its totient is φ = 20170932628828.

The previous prime is 20213131233103. The next prime is 20213131233151. The reversal of 20213131233133 is 33133213131202.

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 not a de Polignac number, because 20213131233133 - 2²⁵ = 20213097678701 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 (20213131233103) 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, 21099301435 + ... + 21099302392.

It is an arithmetic number, because the mean of its divisors is an integer number (5063832459360).

Almost surely, 2^{20213131233133} is an apocalyptic number.

It is an amenable number.

20213131233133 is a deficient number, since it is larger than the sum of its proper divisors (42198604307).

20213131233133 is an equidigital number, since it uses as much as digits as its factorization.

20213131233133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42198604306.

The product of its (nonzero) digits is 5832, while the sum is 28.

Adding to 20213131233133 its reverse (33133213131202), we get a palindrome (53346344364335).

The spelling of 20213131233133 in words is "twenty trillion, two hundred thirteen billion, one hundred thirty-one million, two hundred thirty-three thousand, one hundred thirty-three".