20352642566436 has 18 divisors (see below), whose sum is σ = 51446957598582. Its totient is φ = 6784214188800.

The previous prime is 20352642566429. The next prime is 20352642566467. The reversal of 20352642566436 is 63466524625302.

20352642566436 is a `hidden beast` number, since 2 + 0 + 3 + 5 + 2 + 6 + 42 + 566 + 4 + 36 = 666.

It can be written as a sum of positive squares in only one way, i.e., 20185197926436 + 167444640000 = 4492794^2 + 409200^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 282675591165 + ... + 282675591236.

Almost surely, 2^{20352642566436} is an apocalyptic number.

It is an amenable number.

20352642566436 is an abundant number, since it is smaller than the sum of its proper divisors (31094315032146).

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

20352642566436 is a wasteful number, since it uses less digits than its factorization.

20352642566436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 565351182411 (or 565351182406 counting only the distinct ones).

The product of its (nonzero) digits is 37324800, while the sum is 54.

The spelling of 20352642566436 in words is "twenty trillion, three hundred fifty-two billion, six hundred forty-two million, five hundred sixty-six thousand, four hundred thirty-six".