11320420525 has 6 divisors (see below), whose sum is σ = 14037321482. Its totient is φ = 9056336400.

The previous prime is 11320420523. The next prime is 11320420543. The reversal of 11320420525 is 52502402311.

It can be written as a sum of positive squares in 3 ways, for example, as 77211369 + 11243209156 = 8787^2 + 106034^2 .

It is not a de Polignac number, because 11320420525 - 2¹ = 11320420523 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25), and also a Moran number because the ratio is a prime number: 452816821 = 11320420525 / (1 + 1 + 3 + 2 + 0 + 4 + 2 + 0 + 5 + 2 + 5).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11320420525.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11320420523) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 226408386 + ... + 226408435.

Almost surely, 2^11320420525 is an apocalyptic number.

It is an amenable number.

11320420525 is a deficient number, since it is larger than the sum of its proper divisors (2716900957).

11320420525 is an equidigital number, since it uses as much as digits as its factorization.

11320420525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 452816831 (or 452816826 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

Adding to 11320420525 its reverse (52502402311), we get a palindrome (63822822836).

The spelling of 11320420525 in words is "eleven billion, three hundred twenty million, four hundred twenty thousand, five hundred twenty-five".