21652421245560 has 96 divisors (see below), whose sum is σ = 80423278921440. Its totient is φ = 4949124855552.

The previous prime is 21652421245523. The next prime is 21652421245561. The reversal of 21652421245560 is 6554212425612.

21652421245560 is a `hidden beast` number, since 2 + 1 + 6 + 5 + 2 + 42 + 1 + 2 + 45 + 560 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21652421245561) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4296112807 + ... + 4296117846.

It is an arithmetic number, because the mean of its divisors is an integer number (837742488765).

Almost surely, 2^{21652421245560} is an apocalyptic number.

21652421245560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21652421245560 is an abundant number, since it is smaller than the sum of its proper divisors (58770857675880).

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

21652421245560 is a wasteful number, since it uses less digits than its factorization.

21652421245560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8592230677 (or 8592230670 counting only the distinct ones).

The product of its (nonzero) digits is 1152000, while the sum is 45.

The spelling of 21652421245560 in words is "twenty-one trillion, six hundred fifty-two billion, four hundred twenty-one million, two hundred forty-five thousand, five hundred sixty".