12803644630821 has 16 divisors (see below), whose sum is σ = 18807874026048. Its totient is φ = 7682955072000.

The previous prime is 12803644630811. The next prime is 12803644630849.

12803644630821 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 12803644630821 - 2⁴² = 8405598119717 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12803644630811) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1920735436 + ... + 1920742101.

It is an arithmetic number, because the mean of its divisors is an integer number (1175492126628).

Almost surely, 2^{12803644630821} is an apocalyptic number.

12803644630821 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12803644630821 is a deficient number, since it is larger than the sum of its proper divisors (6004229395227).

12803644630821 is a wasteful number, since it uses less digits than its factorization.

12803644630821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3841477652.

The product of its (nonzero) digits is 1327104, while the sum is 48.

The spelling of 12803644630821 in words is "twelve trillion, eight hundred three billion, six hundred forty-four million, six hundred thirty thousand, eight hundred twenty-one".