21261242500596 has 240 divisors, whose sum is σ = 68568663018240. Its totient is φ = 5610162539520.

The previous prime is 21261242500577. The next prime is 21261242500601. The reversal of 21261242500596 is 69500524216212.

21261242500596 is a `hidden beast` number, since 2 + 1 + 2 + 6 + 1 + 2 + 4 + 2 + 50 + 0 + 596 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 5514565 + ... + 8540076.

It is an arithmetic number, because the mean of its divisors is an integer number (285702762576).

Almost surely, 2^{21261242500596} is an apocalyptic number.

It is an amenable number.

21261242500596 is an abundant number, since it is smaller than the sum of its proper divisors (47307420517644).

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

21261242500596 is a wasteful number, since it uses less digits than its factorization.

21261242500596 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14054716 (or 14054705 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 45.

The spelling of 21261242500596 in words is "twenty-one trillion, two hundred sixty-one billion, two hundred forty-two million, five hundred thousand, five hundred ninety-six".