20147100233 has 4 divisors (see below), whose sum is σ = 21696877188. Its totient is φ = 18597323280.

The previous prime is 20147100227. The next prime is 20147100287. The reversal of 20147100233 is 33200174102.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 33200174102 = 2 ⋅16600087051.

It can be written as a sum of positive squares in 2 ways, for example, as 2482829584 + 17664270649 = 49828^2 + 132907^2 .

It is a cyclic number.

It is not a de Polignac number, because 20147100233 - 2¹⁶ = 20147034697 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20147100199 and 20147100208.

It is not an unprimeable number, because it can be changed into a prime (20147100223) 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, 774888458 + ... + 774888483.

It is an arithmetic number, because the mean of its divisors is an integer number (5424219297).

Almost surely, 2^20147100233 is an apocalyptic number.

It is an amenable number.

20147100233 is a deficient number, since it is larger than the sum of its proper divisors (1549776955).

20147100233 is a wasteful number, since it uses less digits than its factorization.

20147100233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1549776954.

The product of its (nonzero) digits is 1008, while the sum is 23.

Adding to 20147100233 its reverse (33200174102), we get a palindrome (53347274335).

The spelling of 20147100233 in words is "twenty billion, one hundred forty-seven million, one hundred thousand, two hundred thirty-three".