20545222545 has 48 divisors (see below), whose sum is σ = 36936621072. Its totient is φ = 10555660800.

The previous prime is 20545222507. The next prime is 20545222559. The reversal of 20545222545 is 54522254502.

20545222545 is a `hidden beast` number, since 20 + 54 + 522 + 25 + 45 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 8971120656 + 11574101889 = 94716^2 + 107583^2 .

It is not a de Polignac number, because 20545222545 - 2¹⁷ = 20545091473 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

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 47 ways as a sum of consecutive naturals, for example, 107079 + ... + 229251.

It is an arithmetic number, because the mean of its divisors is an integer number (769512939).

Almost surely, 2^20545222545 is an apocalyptic number.

It is an amenable number.

20545222545 is a deficient number, since it is larger than the sum of its proper divisors (16391398527).

20545222545 is a wasteful number, since it uses less digits than its factorization.

20545222545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122322 (or 122319 counting only the distinct ones).

The product of its (nonzero) digits is 160000, while the sum is 36.

The spelling of 20545222545 in words is "twenty billion, five hundred forty-five million, two hundred twenty-two thousand, five hundred forty-five".