21800235594 has 32 divisors (see below), whose sum is σ = 43911201600. Its totient is φ = 7214997632.

The previous prime is 21800235593. The next prime is 21800235601. The reversal of 21800235594 is 49553200812.

It is not an unprimeable number, because it can be changed into a prime (21800235593) 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, 3638269 + ... + 3644255.

It is an arithmetic number, because the mean of its divisors is an integer number (1372225050).

Almost surely, 2^21800235594 is an apocalyptic number.

21800235594 is an abundant number, since it is smaller than the sum of its proper divisors (22110966006).

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

21800235594 is a wasteful number, since it uses less digits than its factorization.

21800235594 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10214.

The product of its (nonzero) digits is 86400, while the sum is 39.

The spelling of 21800235594 in words is "twenty-one billion, eight hundred million, two hundred thirty-five thousand, five hundred ninety-four".