21860754432 has 264 divisors, whose sum is σ = 66856133568. Its totient is φ = 6333972480.

The previous prime is 21860754353. The next prime is 21860754449. The reversal of 21860754432 is 23445706812.

It is a tau number, because it is divible by the number of its divisors (264).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8548098 + ... + 8550654.

Almost surely, 2^21860754432 is an apocalyptic number.

21860754432 is a gapful number since it is divisible by the number (22) 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 21860754432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33428066784).

21860754432 is an abundant number, since it is smaller than the sum of its proper divisors (44995379136).

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

21860754432 is a wasteful number, since it uses less digits than its factorization.

21860754432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2625 (or 2596 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 42.

The spelling of 21860754432 in words is "twenty-one billion, eight hundred sixty million, seven hundred fifty-four thousand, four hundred thirty-two".