20525215512445 has 32 divisors (see below), whose sum is σ = 29633403617280. Its totient is φ = 13332316046400.

The previous prime is 20525215512421. The next prime is 20525215512449. The reversal of 20525215512445 is 54421551252502.

It is not a de Polignac number, because 20525215512445 - 2²¹ = 20525213415293 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20525215512449) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4984324 + ... + 8117506.

It is an arithmetic number, because the mean of its divisors is an integer number (926043863040).

Almost surely, 2^{20525215512445} is an apocalyptic number.

It is an amenable number.

20525215512445 is a deficient number, since it is larger than the sum of its proper divisors (9108188104835).

20525215512445 is a wasteful number, since it uses less digits than its factorization.

20525215512445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3143065.

The product of its (nonzero) digits is 800000, while the sum is 43.

Adding to 20525215512445 its reverse (54421551252502), we get a palindrome (74946766764947).

The spelling of 20525215512445 in words is "twenty trillion, five hundred twenty-five billion, two hundred fifteen million, five hundred twelve thousand, four hundred forty-five".