20004145525 has 36 divisors (see below), whose sum is σ = 30697192992. Its totient is φ = 12661945920.

The previous prime is 20004145523. The next prime is 20004145529. The reversal of 20004145525 is 52554140002.

It is not a de Polignac number, because 20004145525 - 2¹ = 20004145523 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20004145493 and 20004145502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20004145523) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 308619 + ... + 367768.

Almost surely, 2^20004145525 is an apocalyptic number.

20004145525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20004145525 is a deficient number, since it is larger than the sum of its proper divisors (10693047467).

20004145525 is a wasteful number, since it uses less digits than its factorization.

20004145525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 676430 (or 676412 counting only the distinct ones).

The product of its (nonzero) digits is 8000, while the sum is 28.

Adding to 20004145525 its reverse (52554140002), we get a palindrome (72558285527).

The spelling of 20004145525 in words is "twenty billion, four million, one hundred forty-five thousand, five hundred twenty-five".