21260563523461 has 48 divisors (see below), whose sum is σ = 23873204160000. Its totient is φ = 18891178555392.

The previous prime is 21260563523449. The next prime is 21260563523513. The reversal of 21260563523461 is 16432536506212.

It is not a de Polignac number, because 21260563523461 - 2⁵ = 21260563523429 is a prime.

It is a super-2 number, since 2×21260563523461² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21260563523401) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2180789415 + ... + 2180799163.

It is an arithmetic number, because the mean of its divisors is an integer number (497358420000).

Almost surely, 2^{21260563523461} is an apocalyptic number.

It is an amenable number.

21260563523461 is a deficient number, since it is larger than the sum of its proper divisors (2612640636539).

21260563523461 is a wasteful number, since it uses less digits than its factorization.

21260563523461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14038 (or 14021 counting only the distinct ones).

The product of its (nonzero) digits is 1555200, while the sum is 46.

The spelling of 21260563523461 in words is "twenty-one trillion, two hundred sixty billion, five hundred sixty-three million, five hundred twenty-three thousand, four hundred sixty-one".