201823135968 has 24 divisors (see below), whose sum is σ = 529785732168. Its totient is φ = 67274378624.

The previous prime is 201823135961. The next prime is 201823135979. The reversal of 201823135968 is 869531328102.

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201823135961) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1051162071 + ... + 1051162262.

It is an arithmetic number, because the mean of its divisors is an integer number (22074405507).

Almost surely, 2^201823135968 is an apocalyptic number.

It is an amenable number.

201823135968 is an abundant number, since it is smaller than the sum of its proper divisors (327962596200).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

201823135968 is a wasteful number, since it uses less digits than its factorization.

201823135968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2102324346 (or 2102324338 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 48.

The spelling of 201823135968 in words is "two hundred one billion, eight hundred twenty-three million, one hundred thirty-five thousand, nine hundred sixty-eight".