201823704618 has 16 divisors (see below), whose sum is σ = 413034558816. Its totient is φ = 65710043280.

The previous prime is 201823704613. The next prime is 201823704637. The reversal of 201823704618 is 816407328102.

It is a self number, because there is not a number n which added to its sum of digits gives 201823704618.

It is not an unprimeable number, because it can be changed into a prime (201823704611) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 391130953 + ... + 391131468.

It is an arithmetic number, because the mean of its divisors is an integer number (25814659926).

Almost surely, 2^201823704618 is an apocalyptic number.

201823704618 is an abundant number, since it is smaller than the sum of its proper divisors (211210854198).

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

201823704618 is a wasteful number, since it uses less digits than its factorization.

201823704618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 782262469.

The product of its (nonzero) digits is 129024, while the sum is 42.

The spelling of 201823704618 in words is "two hundred one billion, eight hundred twenty-three million, seven hundred four thousand, six hundred eighteen".