20045403252 has 72 divisors (see below), whose sum is σ = 58203040896. Its totient is φ = 5698171584.

The previous prime is 20045403197. The next prime is 20045403253. The reversal of 20045403252 is 25230454002.

It is a happy number.

20045403252 is a `hidden beast` number, since 2 + 0 + 0 + 4 + 5 + 403 + 252 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20045403253) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 152248 + ... + 251535.

It is an arithmetic number, because the mean of its divisors is an integer number (808375568).

Almost surely, 2^20045403252 is an apocalyptic number.

It is an amenable number.

20045403252 is an abundant number, since it is smaller than the sum of its proper divisors (38157637644).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20045403252 is a wasteful number, since it uses less digits than its factorization.

20045403252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 403997 (or 403992 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 27.

Adding to 20045403252 its reverse (25230454002), we get a palindrome (45275857254).

The spelling of 20045403252 in words is "twenty billion, forty-five million, four hundred three thousand, two hundred fifty-two".