21860735744 has 108 divisors (see below), whose sum is σ = 47750533992. Its totient is φ = 9953648640.

The previous prime is 21860735723. The next prime is 21860735753. The reversal of 21860735744 is 44753706812.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4179659 + ... + 4184885.

It is an arithmetic number, because the mean of its divisors is an integer number (442134574).

Almost surely, 2^21860735744 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 21860735744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23875266996).

21860735744 is an abundant number, since it is smaller than the sum of its proper divisors (25889798248).

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

21860735744 is an equidigital number, since it uses as much as digits as its factorization.

21860735744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5322 (or 5277 counting only the distinct ones).

The product of its (nonzero) digits is 1128960, while the sum is 47.

The spelling of 21860735744 in words is "twenty-one billion, eight hundred sixty million, seven hundred thirty-five thousand, seven hundred forty-four".