20525143445 has 4 divisors (see below), whose sum is σ = 24630172140. Its totient is φ = 16420114752.

The previous prime is 20525143439. The next prime is 20525143519. The reversal of 20525143445 is 54434152502.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54434152502 = 2 ⋅27217076251.

It can be written as a sum of positive squares in 2 ways, for example, as 13017440836 + 7507702609 = 114094^2 + 86647^2 .

It is a cyclic number.

It is not a de Polignac number, because 20525143445 - 2⁸ = 20525143189 is a prime.

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, 2052514340 + ... + 2052514349.

It is an arithmetic number, because the mean of its divisors is an integer number (6157543035).

Almost surely, 2^20525143445 is an apocalyptic number.

It is an amenable number.

20525143445 is a deficient number, since it is larger than the sum of its proper divisors (4105028695).

20525143445 is an equidigital number, since it uses as much as digits as its factorization.

20525143445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4105028694.

The product of its (nonzero) digits is 96000, while the sum is 35.

Adding to 20525143445 its reverse (54434152502), we get a palindrome (74959295947).

The spelling of 20525143445 in words is "twenty billion, five hundred twenty-five million, one hundred forty-three thousand, four hundred forty-five".