11520420453 has 40 divisors (see below), whose sum is σ = 17673511680. Its totient is φ = 7475963040.

The previous prime is 11520420449. The next prime is 11520420487. The reversal of 11520420453 is 35402402511.

11520420453 is a `hidden beast` number, since 1 + 1 + 5 + 204 + 2 + 0 + 453 = 666.

It is not a de Polignac number, because 11520420453 - 2² = 11520420449 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11520420053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 441651 + ... + 467007.

It is an arithmetic number, because the mean of its divisors is an integer number (441837792).

Almost surely, 2^11520420453 is an apocalyptic number.

It is an amenable number.

11520420453 is a deficient number, since it is larger than the sum of its proper divisors (6153091227).

11520420453 is an equidigital number, since it uses as much as digits as its factorization.

11520420453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25519 (or 25510 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

Adding to 11520420453 its reverse (35402402511), we get a palindrome (46922822964).

The spelling of 11520420453 in words is "eleven billion, five hundred twenty million, four hundred twenty thousand, four hundred fifty-three".