21893261936 has 320 divisors, whose sum is σ = 57996288000. Its totient is φ = 7925299200.

The previous prime is 21893261921. The next prime is 21893261941. The reversal of 21893261936 is 63916239812.

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 63 ways as a sum of consecutive naturals, for example, 42021356 + ... + 42021876.

It is an arithmetic number, because the mean of its divisors is an integer number (181238400).

Almost surely, 2^21893261936 is an apocalyptic number.

21893261936 is a gapful number since it is divisible by the number (26) 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 21893261936, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28998144000).

21893261936 is an abundant number, since it is smaller than the sum of its proper divisors (36103026064).

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

21893261936 is a wasteful number, since it uses less digits than its factorization.

21893261936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 613 (or 593 counting only the distinct ones).

The product of its digits is 839808, while the sum is 50.

The spelling of 21893261936 in words is "twenty-one billion, eight hundred ninety-three million, two hundred sixty-one thousand, nine hundred thirty-six".