21365506340760 has 128 divisors (see below), whose sum is σ = 66771160473600. Its totient is φ = 5463094740480.

The previous prime is 21365506340749. The next prime is 21365506340767. The reversal of 21365506340760 is 6704360556312.

It is a super-2 number, since 2×21365506340760² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21365506340767) 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, 25940464 + ... + 26751423.

It is an arithmetic number, because the mean of its divisors is an integer number (521649691200).

Almost surely, 2^{21365506340760} is an apocalyptic number.

21365506340760 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21365506340760 is an abundant number, since it is smaller than the sum of its proper divisors (45405654132840).

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

21365506340760 is a wasteful number, since it uses less digits than its factorization.

21365506340760 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52692041 (or 52692037 counting only the distinct ones).

The product of its (nonzero) digits is 2721600, while the sum is 48.

The spelling of 21365506340760 in words is "twenty-one trillion, three hundred sixty-five billion, five hundred six million, three hundred forty thousand, seven hundred sixty".