20525543403 has 8 divisors (see below), whose sum is σ = 27372111168. Its totient is φ = 13681335624.

The previous prime is 20525543399. The next prime is 20525543407. The reversal of 20525543403 is 30434552502.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20525543399) and next prime (20525543407).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20525543403 - 2² = 20525543399 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20525543407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 569601 + ... + 604562.

It is an arithmetic number, because the mean of its divisors is an integer number (3421513896).

Almost surely, 2^20525543403 is an apocalyptic number.

20525543403 is a deficient number, since it is larger than the sum of its proper divisors (6846567765).

20525543403 is a wasteful number, since it uses less digits than its factorization.

20525543403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1179993.

The product of its (nonzero) digits is 72000, while the sum is 33.

Subtracting 20525543403 from its reverse (30434552502), we obtain a palindrome (9909009099).

It can be divided in two parts, 2052 and 5543403, that added together give a palindrome (5545455).

The spelling of 20525543403 in words is "twenty billion, five hundred twenty-five million, five hundred forty-three thousand, four hundred three".