20331213133 has 24 divisors (see below), whose sum is σ = 26090605440. Its totient is φ = 15664461120.

The previous prime is 20331213107. The next prime is 20331213151. The reversal of 20331213133 is 33131213302.

It is not a de Polignac number, because 20331213133 - 2²¹ = 20329115981 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 (20331213103) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 163941 + ... + 259882.

It is an arithmetic number, because the mean of its divisors is an integer number (1087108560).

Almost surely, 2^20331213133 is an apocalyptic number.

It is an amenable number.

20331213133 is a deficient number, since it is larger than the sum of its proper divisors (5759392307).

20331213133 is a wasteful number, since it uses less digits than its factorization.

20331213133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 423937 (or 423930 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 22.

Adding to 20331213133 its reverse (33131213302), we get a palindrome (53462426435).

The spelling of 20331213133 in words is "twenty billion, three hundred thirty-one million, two hundred thirteen thousand, one hundred thirty-three".