205672023404 has 6 divisors (see below), whose sum is σ = 359926040964. Its totient is φ = 102836011700.

The previous prime is 205672023341. The next prime is 205672023407. The reversal of 205672023404 is 404320276502.

It is a super-2 number, since 2×205672023404² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (205672023407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25709002922 + ... + 25709002929.

It is an arithmetic number, because the mean of its divisors is an integer number (59987673494).

Almost surely, 2^205672023404 is an apocalyptic number.

It is an amenable number.

205672023404 is a deficient number, since it is larger than the sum of its proper divisors (154254017560).

205672023404 is a wasteful number, since it uses less digits than its factorization.

205672023404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51418005855 (or 51418005853 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 35.

Adding to 205672023404 its reverse (404320276502), we get a palindrome (609992299906).

The spelling of 205672023404 in words is "two hundred five billion, six hundred seventy-two million, twenty-three thousand, four hundred four".