13904470421 has 2 divisors, whose sum is σ = 13904470422. Its totient is φ = 13904470420.

The previous prime is 13904470417. The next prime is 13904470451. The reversal of 13904470421 is 12407440931.

It is a happy number.

13904470421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11395562500 + 2508907921 = 106750^2 + 50089^2 .

It is a cyclic number.

It is not a de Polignac number, because 13904470421 - 2² = 13904470417 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13904470451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6952235210 + 6952235211.

It is an arithmetic number, because the mean of its divisors is an integer number (6952235211).

Almost surely, 2^13904470421 is an apocalyptic number.

It is an amenable number.

13904470421 is a deficient number, since it is larger than the sum of its proper divisors (1).

13904470421 is an equidigital number, since it uses as much as digits as its factorization.

13904470421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24192, while the sum is 35.

The spelling of 13904470421 in words is "thirteen billion, nine hundred four million, four hundred seventy thousand, four hundred twenty-one".