20120245445 has 4 divisors (see below), whose sum is σ = 24144294540. Its totient is φ = 16096196352.

The previous prime is 20120245427. The next prime is 20120245471. The reversal of 20120245445 is 54454202102.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6898465249 + 13221780196 = 83057^2 + 114986^2 .

It is a cyclic number.

It is not a de Polignac number, because 20120245445 - 2⁶ = 20120245381 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2012024540 + ... + 2012024549.

It is an arithmetic number, because the mean of its divisors is an integer number (6036073635).

Almost surely, 2^20120245445 is an apocalyptic number.

It is an amenable number.

20120245445 is a deficient number, since it is larger than the sum of its proper divisors (4024049095).

20120245445 is an equidigital number, since it uses as much as digits as its factorization.

20120245445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4024049094.

The product of its (nonzero) digits is 12800, while the sum is 29.

Adding to 20120245445 its reverse (54454202102), we get a palindrome (74574447547).

The spelling of 20120245445 in words is "twenty billion, one hundred twenty million, two hundred forty-five thousand, four hundred forty-five".