21801095633868 has 12 divisors (see below), whose sum is σ = 50869223145720. Its totient is φ = 7267031877952.

The previous prime is 21801095633857. The next prime is 21801095633873. The reversal of 21801095633868 is 86833659010812.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 908378984733 + ... + 908378984756.

It is an arithmetic number, because the mean of its divisors is an integer number (4239101928810).

Almost surely, 2^{21801095633868} is an apocalyptic number.

It is an amenable number.

21801095633868 is an abundant number, since it is smaller than the sum of its proper divisors (29068127511852).

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

21801095633868 is a wasteful number, since it uses less digits than its factorization.

21801095633868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1816757969496 (or 1816757969494 counting only the distinct ones).

The product of its (nonzero) digits is 14929920, while the sum is 60.

The spelling of 21801095633868 in words is "twenty-one trillion, eight hundred one billion, ninety-five million, six hundred thirty-three thousand, eight hundred sixty-eight".