21331114398 has 64 divisors (see below), whose sum is σ = 51811799040. Its totient is φ = 6451473600.

The previous prime is 21331114397. The next prime is 21331114451. The reversal of 21331114398 is 89341113312.

21331114398 is a `hidden beast` number, since 213 + 3 + 1 + 1 + 1 + 439 + 8 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21331114397) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 275011 + ... + 343937.

It is an arithmetic number, because the mean of its divisors is an integer number (809559360).

Almost surely, 2^21331114398 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21331114398, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25905899520).

21331114398 is an abundant number, since it is smaller than the sum of its proper divisors (30480684642).

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

21331114398 is a wasteful number, since it uses less digits than its factorization.

21331114398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69470 (or 69464 counting only the distinct ones).

The product of its digits is 15552, while the sum is 36.

The spelling of 21331114398 in words is "twenty-one billion, three hundred thirty-one million, one hundred fourteen thousand, three hundred ninety-eight".