21517768848092 has 96 divisors (see below), whose sum is σ = 41950297509120. Its totient is φ = 9575355525120.

The previous prime is 21517768848091. The next prime is 21517768848139. The reversal of 21517768848092 is 29084886771512.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21517768848091) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 539502383 + ... + 539542265.

It is an arithmetic number, because the mean of its divisors is an integer number (436982265720).

Almost surely, 2^{21517768848092} is an apocalyptic number.

21517768848092 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21517768848092 is a deficient number, since it is larger than the sum of its proper divisors (20432528661028).

21517768848092 is a wasteful number, since it uses less digits than its factorization.

21517768848092 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41091 (or 41089 counting only the distinct ones).

The product of its (nonzero) digits is 108380160, while the sum is 68.

The spelling of 21517768848092 in words is "twenty-one trillion, five hundred seventeen billion, seven hundred sixty-eight million, eight hundred forty-eight thousand, ninety-two".