20545592484565 has 16 divisors (see below), whose sum is σ = 24665349211776. Its totient is φ = 16429382798400.

The previous prime is 20545592484553. The next prime is 20545592484607. The reversal of 20545592484565 is 56548429554502.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-20545592484565 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20545592484497 and 20545592484506.

It is a congruent number.

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, 197800534 + ... + 197904376.

It is an arithmetic number, because the mean of its divisors is an integer number (1541584325736).

Almost surely, 2^{20545592484565} is an apocalyptic number.

It is an amenable number.

20545592484565 is a deficient number, since it is larger than the sum of its proper divisors (4119756727211).

20545592484565 is a wasteful number, since it uses less digits than its factorization.

20545592484565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120540.

The product of its (nonzero) digits is 345600000, while the sum is 64.

The spelling of 20545592484565 in words is "twenty trillion, five hundred forty-five billion, five hundred ninety-two million, four hundred eighty-four thousand, five hundred sixty-five".