12013653631 has 4 divisors (see below), whose sum is σ = 13729889872. Its totient is φ = 10297417392.

The previous prime is 12013653629. The next prime is 12013653643. The reversal of 12013653631 is 13635631021.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12013653631 - 2¹ = 12013653629 is a prime.

It is a super-2 number, since 2×12013653631² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12013653593 and 12013653602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12013653671) 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 3 ways as a sum of consecutive naturals, for example, 858118110 + ... + 858118123.

It is an arithmetic number, because the mean of its divisors is an integer number (3432472468).

Almost surely, 2^12013653631 is an apocalyptic number.

12013653631 is a deficient number, since it is larger than the sum of its proper divisors (1716236241).

12013653631 is an equidigital number, since it uses as much as digits as its factorization.

12013653631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1716236240.

The product of its (nonzero) digits is 9720, while the sum is 31.

The spelling of 12013653631 in words is "twelve billion, thirteen million, six hundred fifty-three thousand, six hundred thirty-one".