20202986252545 has 16 divisors (see below), whose sum is σ = 24304195338192. Its totient is φ = 16121995315200.

The previous prime is 20202986252521. The next prime is 20202986252573. The reversal of 20202986252545 is 54525268920202.

It can be written as a sum of positive squares in 8 ways, for example, as 5243326008561 + 14959660243984 = 2289831^2 + 3867772^2 .

It is not a de Polignac number, because 20202986252545 - 2⁷ = 20202986252417 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20202986252492 and 20202986252501.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10531195 + ... + 12300895.

It is an arithmetic number, because the mean of its divisors is an integer number (1519012208637).

Almost surely, 2^{20202986252545} is an apocalyptic number.

It is an amenable number.

20202986252545 is a deficient number, since it is larger than the sum of its proper divisors (4101209085647).

20202986252545 is a wasteful number, since it uses less digits than its factorization.

20202986252545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1775412.

The product of its (nonzero) digits is 6912000, while the sum is 52.

The spelling of 20202986252545 in words is "twenty trillion, two hundred two billion, nine hundred eighty-six million, two hundred fifty-two thousand, five hundred forty-five".