203642135997 has 16 divisors (see below), whose sum is σ = 272905512000. Its totient is φ = 135071846784.

The previous prime is 203642135933. The next prime is 203642136101. The reversal of 203642135997 is 799531246302.

It is not a de Polignac number, because 203642135997 - 2⁶ = 203642135933 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203642135297) 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, 246079 + ... + 683987.

It is an arithmetic number, because the mean of its divisors is an integer number (17056594500).

Almost surely, 2^203642135997 is an apocalyptic number.

It is an amenable number.

203642135997 is a deficient number, since it is larger than the sum of its proper divisors (69263376003).

203642135997 is a wasteful number, since it uses less digits than its factorization.

203642135997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 438700.

The product of its (nonzero) digits is 2449440, while the sum is 51.

The spelling of 203642135997 in words is "two hundred three billion, six hundred forty-two million, one hundred thirty-five thousand, nine hundred ninety-seven".