12020451663 has 32 divisors (see below), whose sum is σ = 17669912832. Its totient is φ = 7208115200.

The previous prime is 12020451643. The next prime is 12020451683. The reversal of 12020451663 is 36615402021.

It is an interprime number because it is at equal distance from previous prime (12020451643) and next prime (12020451683).

It is not a de Polignac number, because 12020451663 - 2⁹ = 12020451151 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12020451663.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12020451623) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1522081 + ... + 1529957.

It is an arithmetic number, because the mean of its divisors is an integer number (552184776).

Almost surely, 2^12020451663 is an apocalyptic number.

12020451663 is a deficient number, since it is larger than the sum of its proper divisors (5649461169).

12020451663 is a wasteful number, since it uses less digits than its factorization.

12020451663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8375.

The product of its (nonzero) digits is 8640, while the sum is 30.

Adding to 12020451663 its reverse (36615402021), we get a palindrome (48635853684).

The spelling of 12020451663 in words is "twelve billion, twenty million, four hundred fifty-one thousand, six hundred sixty-three".