20004545002 has 16 divisors (see below), whose sum is σ = 32634989352. Its totient is φ = 9141451200.

The previous prime is 20004544979. The next prime is 20004545003. The reversal of 20004545002 is 20054540002.

It can be written as a sum of positive squares in 4 ways, for example, as 15401058201 + 4603486801 = 124101^2 + 67849^2 .

It is not an unprimeable number, because it can be changed into a prime (20004545003) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3806313 + ... + 3811564.

Almost surely, 2^20004545002 is an apocalyptic number.

20004545002 is a deficient number, since it is larger than the sum of its proper divisors (12630444350).

20004545002 is a wasteful number, since it uses less digits than its factorization.

20004545002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7617993.

The product of its (nonzero) digits is 1600, while the sum is 22.

Multiplying 20004545002 by its sum of digits (22), we get a palindrome (440099990044).

Subtracting 20004545002 from its reverse (20054540002), we obtain a triangular number (49995000 = T₉₉₉₉).

The spelling of 20004545002 in words is "twenty billion, four million, five hundred forty-five thousand, two".