20532351236545 has 24 divisors (see below), whose sum is σ = 25587265601664. Its totient is φ = 15816256292928.

The previous prime is 20532351236479. The next prime is 20532351236599. The reversal of 20532351236545 is 54563215323502.

It is a happy number.

It is not a de Polignac number, because 20532351236545 - 2⁷ = 20532351236417 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20532351236495 and 20532351236504.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5109139 + ... + 8195608.

It is an arithmetic number, because the mean of its divisors is an integer number (1066136066736).

Almost surely, 2^{20532351236545} is an apocalyptic number.

It is an amenable number.

20532351236545 is a deficient number, since it is larger than the sum of its proper divisors (5054914365119).

20532351236545 is a wasteful number, since it uses less digits than its factorization.

20532351236545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13305177 (or 13305148 counting only the distinct ones).

The product of its (nonzero) digits is 3240000, while the sum is 46.

The spelling of 20532351236545 in words is "twenty trillion, five hundred thirty-two billion, three hundred fifty-one million, two hundred thirty-six thousand, five hundred forty-five".