20045311253 has 16 divisors (see below), whose sum is σ = 22572722304. Its totient is φ = 17640423360.

The previous prime is 20045311229. The next prime is 20045311267. The reversal of 20045311253 is 35211354002.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 20045311253 - 2¹⁸ = 20045049109 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20045311213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44825 + ... + 205182.

It is an arithmetic number, because the mean of its divisors is an integer number (1410795144).

Almost surely, 2^20045311253 is an apocalyptic number.

It is an amenable number.

20045311253 is a deficient number, since it is larger than the sum of its proper divisors (2527411051).

20045311253 is a wasteful number, since it uses less digits than its factorization.

20045311253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250252.

The product of its (nonzero) digits is 3600, while the sum is 26.

Adding to 20045311253 its reverse (35211354002), we get a palindrome (55256665255).

The spelling of 20045311253 in words is "twenty billion, forty-five million, three hundred eleven thousand, two hundred fifty-three".