20436366545 has 12 divisors (see below), whose sum is σ = 28527499764. Its totient is φ = 14013508320.

The previous prime is 20436366521. The next prime is 20436366551. The reversal of 20436366545 is 54566363402.

It can be written as a sum of positive squares in 2 ways, for example, as 4388797504 + 16047569041 = 66248^2 + 126679^2 .

It is not a de Polignac number, because 20436366545 - 2¹⁶ = 20436301009 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20436366496 and 20436366505.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 41706626 + ... + 41707115.

It is an arithmetic number, because the mean of its divisors is an integer number (2377291647).

Almost surely, 2^20436366545 is an apocalyptic number.

It is an amenable number.

20436366545 is a deficient number, since it is larger than the sum of its proper divisors (8091133219).

20436366545 is an equidigital number, since it uses as much as digits as its factorization.

20436366545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83413760 (or 83413753 counting only the distinct ones).

The product of its (nonzero) digits is 1555200, while the sum is 44.

The spelling of 20436366545 in words is "twenty billion, four hundred thirty-six million, three hundred sixty-six thousand, five hundred forty-five".