21422871360 has 448 divisors, whose sum is σ = 84020924160. Its totient is φ = 5094236160.

The previous prime is 21422871359. The next prime is 21422871391. The reversal of 21422871360 is 6317822412.

It is a happy number.

21422871360 is a `hidden beast` number, since 2 + 1 + 4 + 228 + 71 + 360 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 5034994 + ... + 5039246.

Almost surely, 2^21422871360 is an apocalyptic number.

21422871360 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21422871360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42010462080).

21422871360 is an abundant number, since it is smaller than the sum of its proper divisors (62598052800).

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

21422871360 is a wasteful number, since it uses less digits than its factorization.

21422871360 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4343 (or 4327 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The spelling of 21422871360 in words is "twenty-one billion, four hundred twenty-two million, eight hundred seventy-one thousand, three hundred sixty".