20145302545 has 8 divisors (see below), whose sum is σ = 25007961960. Its totient is φ = 15560509440.

The previous prime is 20145302531. The next prime is 20145302599. The reversal of 20145302545 is 54520354102.

It can be written as a sum of positive squares in 4 ways, for example, as 4328718849 + 15816583696 = 65793^2 + 125764^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20145302545 - 2¹⁵ = 20145269777 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69466416 + ... + 69466705.

It is an arithmetic number, because the mean of its divisors is an integer number (3125995245).

Almost surely, 2^20145302545 is an apocalyptic number.

It is an amenable number.

20145302545 is a deficient number, since it is larger than the sum of its proper divisors (4862659415).

20145302545 is a wasteful number, since it uses less digits than its factorization.

20145302545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138933155.

The product of its (nonzero) digits is 24000, while the sum is 31.

Adding to 20145302545 its reverse (54520354102), we get a palindrome (74665656647).

The spelling of 20145302545 in words is "twenty billion, one hundred forty-five million, three hundred two thousand, five hundred forty-five".