20012100233 has 4 divisors (see below), whose sum is σ = 20091829968. Its totient is φ = 19932370500.

The previous prime is 20012100217. The next prime is 20012100259. The reversal of 20012100233 is 33200121002.

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 a cyclic number.

It is not a de Polignac number, because 20012100233 - 2⁴ = 20012100217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20012100263) 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, 39864491 + ... + 39864992.

It is an arithmetic number, because the mean of its divisors is an integer number (5022957492).

Almost surely, 2^20012100233 is an apocalyptic number.

It is an amenable number.

20012100233 is a deficient number, since it is larger than the sum of its proper divisors (79729735).

20012100233 is an equidigital number, since it uses as much as digits as its factorization.

20012100233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79729734.

The product of its (nonzero) digits is 72, while the sum is 14.

Adding to 20012100233 its reverse (33200121002), we get a palindrome (53212221235).

It can be divided in two parts, 200121002 and 33, that multiplied together give a palindrome (6603993066).

The spelling of 20012100233 in words is "twenty billion, twelve million, one hundred thousand, two hundred thirty-three".