20430011525 has 48 divisors (see below), whose sum is σ = 31607262720. Its totient is φ = 12726321600.

The previous prime is 20430011507. The next prime is 20430011527. The reversal of 20430011525 is 52511003402.

It is not a de Polignac number, because 20430011525 - 2⁶ = 20430011461 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20430011525.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20430011527) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3437006 + ... + 3442944.

It is an arithmetic number, because the mean of its divisors is an integer number (658484640).

Almost surely, 2^20430011525 is an apocalyptic number.

20430011525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20430011525 is a deficient number, since it is larger than the sum of its proper divisors (11177251195).

20430011525 is a wasteful number, since it uses less digits than its factorization.

20430011525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7754 (or 7749 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 23.

Adding to 20430011525 its reverse (52511003402), we get a palindrome (72941014927).

The spelling of 20430011525 in words is "twenty billion, four hundred thirty million, eleven thousand, five hundred twenty-five".