20131000233 has 4 divisors (see below), whose sum is σ = 26841333648. Its totient is φ = 13420666820.

The previous prime is 20131000181. The next prime is 20131000249. The reversal of 20131000233 is 33200013102.

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 20131000233 - 2¹³ = 20130992041 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20131000283) 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, 3355166703 + ... + 3355166708.

It is an arithmetic number, because the mean of its divisors is an integer number (6710333412).

Almost surely, 2^20131000233 is an apocalyptic number.

It is an amenable number.

20131000233 is a deficient number, since it is larger than the sum of its proper divisors (6710333415).

20131000233 is an equidigital number, since it uses as much as digits as its factorization.

20131000233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6710333414.

The product of its (nonzero) digits is 108, while the sum is 15.

Adding to 20131000233 its reverse (33200013102), we get a palindrome (53331013335).

The spelling of 20131000233 in words is "twenty billion, one hundred thirty-one million, two hundred thirty-three", and thus it is an aban number.