21936951360 has 392 divisors, whose sum is σ = 78835764096. Its totient is φ = 5811471360.

The previous prime is 21936951341. The next prime is 21936951403. The reversal of 21936951360 is 6315963912.

21936951360 is a `hidden beast` number, since 2 + 19 + 3 + 69 + 513 + 60 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 63218707 + ... + 63219053.

Almost surely, 2^21936951360 is an apocalyptic number.

21936951360 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 21936951360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39417882048).

21936951360 is an abundant number, since it is smaller than the sum of its proper divisors (56898812736).

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

21936951360 is an equidigital number, since it uses as much as digits as its factorization.

21936951360 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 653 (or 628 counting only the distinct ones).

The product of its (nonzero) digits is 262440, while the sum is 45.

The spelling of 21936951360 in words is "twenty-one billion, nine hundred thirty-six million, nine hundred fifty-one thousand, three hundred sixty".