20131133233 has 4 divisors (see below), whose sum is σ = 20132257600. Its totient is φ = 20130008868.

The previous prime is 20131133221. The next prime is 20131133293. The reversal of 20131133233 is 33233113102.

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 20131133233 - 2¹³ = 20131125041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20131133293) 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, 534885 + ... + 571282.

It is an arithmetic number, because the mean of its divisors is an integer number (5033064400).

Almost surely, 2^20131133233 is an apocalyptic number.

It is an amenable number.

20131133233 is a deficient number, since it is larger than the sum of its proper divisors (1124367).

20131133233 is a wasteful number, since it uses less digits than its factorization.

20131133233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1124366.

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

Adding to 20131133233 its reverse (33233113102), we get a palindrome (53364246335).

The spelling of 20131133233 in words is "twenty billion, one hundred thirty-one million, one hundred thirty-three thousand, two hundred thirty-three".