21322232198878 has 16 divisors (see below), whose sum is σ = 34443767650320. Its totient is φ = 9840984019776.

The previous prime is 21322232198863. The next prime is 21322232198989. The reversal of 21322232198878 is 87889123222312.

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 7 ways as a sum of consecutive naturals, for example, 4067401 + ... + 7693387.

It is an arithmetic number, because the mean of its divisors is an integer number (2152735478145).

Almost surely, 2^{21322232198878} is an apocalyptic number.

21322232198878 is a deficient number, since it is larger than the sum of its proper divisors (13121535451442).

21322232198878 is a wasteful number, since it uses less digits than its factorization.

21322232198878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3852171.

The product of its digits is 9289728, while the sum is 58.

The spelling of 21322232198878 in words is "twenty-one trillion, three hundred twenty-two billion, two hundred thirty-two million, one hundred ninety-eight thousand, eight hundred seventy-eight".