13995678484821 has 64 divisors (see below), whose sum is σ = 20596060532736. Its totient is φ = 8383166880000.

The previous prime is 13995678484819. The next prime is 13995678484849. The reversal of 13995678484821 is 12848487659931.

It is not a de Polignac number, because 13995678484821 - 2¹ = 13995678484819 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13995678484321) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3386322271 + ... + 3386326403.

It is an arithmetic number, because the mean of its divisors is an integer number (321813445824).

Almost surely, 2^{13995678484821} is an apocalyptic number.

13995678484821 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

13995678484821 is a deficient number, since it is larger than the sum of its proper divisors (6600382047915).

13995678484821 is a wasteful number, since it uses less digits than its factorization.

13995678484821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6282.

The product of its digits is 836075520, while the sum is 75.

The spelling of 13995678484821 in words is "thirteen trillion, nine hundred ninety-five billion, six hundred seventy-eight million, four hundred eighty-four thousand, eight hundred twenty-one".