12020306615 has 4 divisors (see below), whose sum is σ = 14424367944. Its totient is φ = 9616245288.

The previous prime is 12020306611. The next prime is 12020306663. The reversal of 12020306615 is 51660302021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 51660302021 = 227 ⋅227578423.

It is a cyclic number.

It is not a de Polignac number, because 12020306615 - 2² = 12020306611 is a prime.

It is a super-2 number, since 2×12020306615² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12020306611) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1202030657 + ... + 1202030666.

It is an arithmetic number, because the mean of its divisors is an integer number (3606091986).

Almost surely, 2^12020306615 is an apocalyptic number.

12020306615 is a deficient number, since it is larger than the sum of its proper divisors (2404061329).

12020306615 is an equidigital number, since it uses as much as digits as its factorization.

12020306615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2404061328.

The product of its (nonzero) digits is 2160, while the sum is 26.

Adding to 12020306615 its reverse (51660302021), we get a palindrome (63680608636).

The spelling of 12020306615 in words is "twelve billion, twenty million, three hundred six thousand, six hundred fifteen".