21230196037808 has 20 divisors (see below), whose sum is σ = 43298426130360. Its totient is φ = 10056408649344.

The previous prime is 21230196037807. The next prime is 21230196037829. The reversal of 21230196037808 is 80873069103212.

It is not an unprimeable number, because it can be changed into a prime (21230196037807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34918085285 + ... + 34918085892.

It is an arithmetic number, because the mean of its divisors is an integer number (2164921306518).

Almost surely, 2^{21230196037808} is an apocalyptic number.

It is an amenable number.

21230196037808 is an abundant number, since it is smaller than the sum of its proper divisors (22068230092552).

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

21230196037808 is a wasteful number, since it uses less digits than its factorization.

21230196037808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69836171204 (or 69836171198 counting only the distinct ones).

The product of its (nonzero) digits is 870912, while the sum is 50.

The spelling of 21230196037808 in words is "twenty-one trillion, two hundred thirty billion, one hundred ninety-six million, thirty-seven thousand, eight hundred eight".