20424518145 has 24 divisors (see below), whose sum is σ = 36713703936. Its totient is φ = 10893075696.

The previous prime is 20424518143. The next prime is 20424518159. The reversal of 20424518145 is 54181542402.

20424518145 is a `hidden beast` number, since 20 + 42 + 451 + 8 + 145 = 666.

It is not a de Polignac number, because 20424518145 - 2¹ = 20424518143 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20424518143) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 8403937 + ... + 8406366.

It is an arithmetic number, because the mean of its divisors is an integer number (1529737664).

Almost surely, 2^20424518145 is an apocalyptic number.

It is an amenable number.

20424518145 is a deficient number, since it is larger than the sum of its proper divisors (16289185791).

20424518145 is an equidigital number, since it uses as much as digits as its factorization.

20424518145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16810323 (or 16810311 counting only the distinct ones).

The product of its (nonzero) digits is 51200, while the sum is 36.

The spelling of 20424518145 in words is "twenty billion, four hundred twenty-four million, five hundred eighteen thousand, one hundred forty-five".