203424423555 has 32 divisors (see below), whose sum is σ = 336734438400. Its totient is φ = 104741949312.

The previous prime is 203424423551. The next prime is 203424423577. The reversal of 203424423555 is 555324424302.

It is not a de Polignac number, because 203424423555 - 2² = 203424423551 is a prime.

It is not an unprimeable number, because it can be changed into a prime (203424423551) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7485402 + ... + 7512528.

It is an arithmetic number, because the mean of its divisors is an integer number (10522951200).

Almost surely, 2^203424423555 is an apocalyptic number.

203424423555 is a deficient number, since it is larger than the sum of its proper divisors (133310014845).

203424423555 is a wasteful number, since it uses less digits than its factorization.

203424423555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44403.

The product of its (nonzero) digits is 576000, while the sum is 39.

Adding to 203424423555 its reverse (555324424302), we get a palindrome (758748847857).

The spelling of 203424423555 in words is "two hundred three billion, four hundred twenty-four million, four hundred twenty-three thousand, five hundred fifty-five".