204023011 has 4 divisors (see below), whose sum is σ = 208999224. Its totient is φ = 199046800.

The previous prime is 204023009. The next prime is 204023021. The reversal of 204023011 is 110320402.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 110320402 = 2 ⋅55160201.

It is not a de Polignac number, because 204023011 - 2¹ = 204023009 is a prime.

It is a super-2 number, since 2×204023011² = 83250778035012242, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 204022982 and 204023000.

It is not an unprimeable number, because it can be changed into a prime (204023021) 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, 2488045 + ... + 2488126.

It is an arithmetic number, because the mean of its divisors is an integer number (52249806).

Almost surely, 2^204023011 is an apocalyptic number.

204023011 is a deficient number, since it is larger than the sum of its proper divisors (4976213).

204023011 is an equidigital number, since it uses as much as digits as its factorization.

204023011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4976212.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 204023011 is about 14283.6623804961. The cubic root of 204023011 is about 588.6986649014.

Adding to 204023011 its reverse (110320402), we get a palindrome (314343413).

The spelling of 204023011 in words is "two hundred four million, twenty-three thousand, eleven".