21453766798848 has 320 divisors, whose sum is σ = 61816352547840. Its totient is φ = 6588776742912.

The previous prime is 21453766798837. The next prime is 21453766798859. The reversal of 21453766798848 is 84889766735412.

It is an interprime number because it is at equal distance from previous prime (21453766798837) and next prime (21453766798859).

It is a super-2 number, since 2×21453766798848² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4128103386 + ... + 4128108582.

It is an arithmetic number, because the mean of its divisors is an integer number (193176101712).

Almost surely, 2^{21453766798848} 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 21453766798848, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30908176273920).

21453766798848 is an abundant number, since it is smaller than the sum of its proper divisors (40362585748992).

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

21453766798848 is a wasteful number, since it uses less digits than its factorization.

21453766798848 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9097 (or 9081 counting only the distinct ones).

The product of its digits is 3901685760, while the sum is 78.

The spelling of 21453766798848 in words is "twenty-one trillion, four hundred fifty-three billion, seven hundred sixty-six million, seven hundred ninety-eight thousand, eight hundred forty-eight".