21355342207632 has 60 divisors (see below), whose sum is σ = 61826170340220. Its totient is φ = 6872983697664.

The previous prime is 21355342207609. The next prime is 21355342207691. The reversal of 21355342207632 is 23670224355312.

21355342207632 is a `hidden beast` number, since 2 + 1 + 3 + 5 + 5 + 3 + 4 + 2 + 2 + 0 + 7 + 632 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 8499417221376 + 12855924986256 = 2915376^2 + 3585516^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2556909403 + ... + 2556917754.

It is an arithmetic number, because the mean of its divisors is an integer number (1030436172337).

Almost surely, 2^{21355342207632} is an apocalyptic number.

It is an amenable number.

21355342207632 is an abundant number, since it is smaller than the sum of its proper divisors (40470828132588).

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

21355342207632 is a wasteful number, since it uses less digits than its factorization.

21355342207632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5113827200 (or 5113827191 counting only the distinct ones).

The product of its (nonzero) digits is 1814400, while the sum is 45.

The spelling of 21355342207632 in words is "twenty-one trillion, three hundred fifty-five billion, three hundred forty-two million, two hundred seven thousand, six hundred thirty-two".