205403533402 has 4 divisors (see below), whose sum is σ = 308105300106. Its totient is φ = 102701766700.

The previous prime is 205403533399. The next prime is 205403533417. The reversal of 205403533402 is 204335304502.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 203365823521 + 2037709881 = 450961^2 + 45141^2 .

It is a super-2 number, since 2×205403533402² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

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, 51350883349 + ... + 51350883352.

Almost surely, 2^205403533402 is an apocalyptic number.

205403533402 is a deficient number, since it is larger than the sum of its proper divisors (102701766704).

205403533402 is a wasteful number, since it uses less digits than its factorization.

205403533402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102701766703.

The product of its (nonzero) digits is 43200, while the sum is 31.

Adding to 205403533402 its reverse (204335304502), we get a palindrome (409738837904).

The spelling of 205403533402 in words is "two hundred five billion, four hundred three million, five hundred thirty-three thousand, four hundred two".