13948841021 has 4 divisors (see below), whose sum is σ = 13950334812. Its totient is φ = 13947347232.

The previous prime is 13948840973. The next prime is 13948841033. The reversal of 13948841021 is 12014884931.

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

It can be written as a sum of positive squares in 2 ways, for example, as 2588265625 + 11360575396 = 50875^2 + 106586^2 .

It is a cyclic number.

It is not a de Polignac number, because 13948841021 - 2⁶ = 13948840957 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13948841021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13948841041) 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, 732800 + ... + 751593.

It is an arithmetic number, because the mean of its divisors is an integer number (3487583703).

Almost surely, 2^13948841021 is an apocalyptic number.

It is an amenable number.

13948841021 is a deficient number, since it is larger than the sum of its proper divisors (1493791).

13948841021 is an equidigital number, since it uses as much as digits as its factorization.

13948841021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1493790.

The product of its (nonzero) digits is 55296, while the sum is 41.

The spelling of 13948841021 in words is "thirteen billion, nine hundred forty-eight million, eight hundred forty-one thousand, twenty-one".