21848763720 has 64 divisors (see below), whose sum is σ = 74910049920. Its totient is φ = 4994002944.

The previous prime is 21848763719. The next prime is 21848763731. The reversal of 21848763720 is 2736784812.

It is a self number, because there is not a number n which added to its sum of digits gives 21848763720.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13004377 + ... + 13006056.

It is an arithmetic number, because the mean of its divisors is an integer number (1170469530).

Almost surely, 2^21848763720 is an apocalyptic number.

21848763720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21848763720 is an abundant number, since it is smaller than the sum of its proper divisors (53061286200).

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

21848763720 is a wasteful number, since it uses less digits than its factorization.

21848763720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26010454 (or 26010450 counting only the distinct ones).

The product of its (nonzero) digits is 903168, while the sum is 48.

The spelling of 21848763720 in words is "twenty-one billion, eight hundred forty-eight million, seven hundred sixty-three thousand, seven hundred twenty".