205023443403 has 16 divisors (see below), whose sum is σ = 278606309760. Its totient is φ = 134071576896.

The previous prime is 205023443351. The next prime is 205023443407. The reversal of 205023443403 is 304344320502.

It is not a de Polignac number, because 205023443403 - 2¹² = 205023439307 is a prime.

It is a super-2 number, since 2×205023443403² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (205023443407) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1186425 + ... + 1348202.

It is an arithmetic number, because the mean of its divisors is an integer number (17412894360).

Almost surely, 2^205023443403 is an apocalyptic number.

205023443403 is a deficient number, since it is larger than the sum of its proper divisors (73582866357).

205023443403 is a wasteful number, since it uses less digits than its factorization.

205023443403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2535146.

The product of its (nonzero) digits is 34560, while the sum is 30.

Adding to 205023443403 its reverse (304344320502), we get a palindrome (509367763905).

The spelling of 205023443403 in words is "two hundred five billion, twenty-three million, four hundred forty-three thousand, four hundred three".