13944900421 has 4 divisors (see below), whose sum is σ = 14082968844. Its totient is φ = 13806832000.

The previous prime is 13944900419. The next prime is 13944900439. The reversal of 13944900421 is 12400944931.

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 8944430625 + 5000469796 = 94575^2 + 70714^2 .

It is a cyclic number.

It is not a de Polignac number, because 13944900421 - 2¹ = 13944900419 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13944900461) 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, 69034060 + ... + 69034261.

It is an arithmetic number, because the mean of its divisors is an integer number (3520742211).

Almost surely, 2^13944900421 is an apocalyptic number.

It is an amenable number.

13944900421 is a deficient number, since it is larger than the sum of its proper divisors (138068423).

13944900421 is a wasteful number, since it uses less digits than its factorization.

13944900421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138068422.

The product of its (nonzero) digits is 31104, while the sum is 37.

The spelling of 13944900421 in words is "thirteen billion, nine hundred forty-four million, nine hundred thousand, four hundred twenty-one".