20045202145 has 8 divisors (see below), whose sum is σ = 24095934504. Its totient is φ = 16008367104.

The previous prime is 20045202119. The next prime is 20045202173. The reversal of 20045202145 is 54120254002.

It can be written as a sum of positive squares in 4 ways, for example, as 1753180641 + 18292021504 = 41871^2 + 135248^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 20045202145 - 2⁷ = 20045202017 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3471154 + ... + 3476923.

It is an arithmetic number, because the mean of its divisors is an integer number (3011991813).

Almost surely, 2^20045202145 is an apocalyptic number.

It is an amenable number.

20045202145 is a deficient number, since it is larger than the sum of its proper divisors (4050732359).

20045202145 is an equidigital number, since it uses as much as digits as its factorization.

20045202145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6948659.

The product of its (nonzero) digits is 3200, while the sum is 25.

Adding to 20045202145 its reverse (54120254002), we get a palindrome (74165456147).

The spelling of 20045202145 in words is "twenty billion, forty-five million, two hundred two thousand, one hundred forty-five".