20525431130 has 16 divisors (see below), whose sum is σ = 37131436800. Its totient is φ = 8168914512.

The previous prime is 20525431103. The next prime is 20525431139. The reversal of 20525431130 is 3113452502.

It is a happy number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 20525431130.

It is not an unprimeable number, because it can be changed into a prime (20525431139) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5155154 + ... + 5159133.

It is an arithmetic number, because the mean of its divisors is an integer number (2320714800).

Almost surely, 2^20525431130 is an apocalyptic number.

20525431130 is a deficient number, since it is larger than the sum of its proper divisors (16606005670).

20525431130 is a wasteful number, since it uses less digits than its factorization.

20525431130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10314493.

The product of its (nonzero) digits is 3600, while the sum is 26.

Adding to 20525431130 its reverse (3113452502), we get a palindrome (23638883632).

The spelling of 20525431130 in words is "twenty billion, five hundred twenty-five million, four hundred thirty-one thousand, one hundred thirty".