21260541545052 has 48 divisors (see below), whose sum is σ = 51832111752960. Its totient is φ = 6769908338688.

The previous prime is 21260541545051. The next prime is 21260541545057. The reversal of 21260541545052 is 25054514506212.

It is a junction number, because it is equal to n+sod(n) for n = 21260541544995 and 21260541545013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21260541545051) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49872898 + ... + 50297385.

It is an arithmetic number, because the mean of its divisors is an integer number (1079835661520).

Almost surely, 2^{21260541545052} is an apocalyptic number.

It is an amenable number.

21260541545052 is an abundant number, since it is smaller than the sum of its proper divisors (30571570207908).

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

21260541545052 is a wasteful number, since it uses less digits than its factorization.

21260541545052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100171082 (or 100171080 counting only the distinct ones).

The product of its (nonzero) digits is 480000, while the sum is 42.

The spelling of 21260541545052 in words is "twenty-one trillion, two hundred sixty billion, five hundred forty-one million, five hundred forty-five thousand, fifty-two".