21955921903104 has 160 divisors (see below), whose sum is σ = 67845673479936. Its totient is φ = 6179491676160.

The previous prime is 21955921903039. The next prime is 21955921903117. The reversal of 21955921903104 is 40130912955912.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14518657 + ... + 15959424.

Almost surely, 2^{21955921903104} is an apocalyptic number.

21955921903104 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21955921903104 is an abundant number, since it is smaller than the sum of its proper divisors (45889751576832).

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

21955921903104 is an equidigital number, since it uses as much as digits as its factorization.

21955921903104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30478176 (or 30478160 counting only the distinct ones).

The product of its (nonzero) digits is 874800, while the sum is 51.

The spelling of 21955921903104 in words is "twenty-one trillion, nine hundred fifty-five billion, nine hundred twenty-one million, nine hundred three thousand, one hundred four".