21967093368 has 192 divisors, whose sum is σ = 68113094400. Its totient is φ = 6330762240.

The previous prime is 21967093361. The next prime is 21967093381. The reversal of 21967093368 is 86339076912.

21967093368 is a `hidden beast` number, since 2 + 196 + 7 + 0 + 93 + 368 = 666.

It is a Cunningham number, because it is equal to 148213²-1.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21967093361) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3257296 + ... + 3264032.

It is an arithmetic number, because the mean of its divisors is an integer number (354755700).

Almost surely, 2^21967093368 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21967093368, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34056547200).

21967093368 is an abundant number, since it is smaller than the sum of its proper divisors (46146001032).

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

21967093368 is a wasteful number, since it uses less digits than its factorization.

21967093368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6962 (or 6955 counting only the distinct ones).

The product of its (nonzero) digits is 2939328, while the sum is 54.

The spelling of 21967093368 in words is "twenty-one billion, nine hundred sixty-seven million, ninety-three thousand, three hundred sixty-eight".