13634465421 has 16 divisors (see below), whose sum is σ = 18240145920. Its totient is φ = 9059265600.

The previous prime is 13634465393. The next prime is 13634465431. The reversal of 13634465421 is 12456443631.

It is not a de Polignac number, because 13634465421 - 2⁷ = 13634465293 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13634465421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13634465431) 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 15 ways as a sum of consecutive naturals, for example, 1174596 + ... + 1186146.

It is an arithmetic number, because the mean of its divisors is an integer number (1140009120).

Almost surely, 2^13634465421 is an apocalyptic number.

It is an amenable number.

13634465421 is a deficient number, since it is larger than the sum of its proper divisors (4605680499).

13634465421 is a wasteful number, since it uses less digits than its factorization.

13634465421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12836.

The product of its digits is 207360, while the sum is 39.

The spelling of 13634465421 in words is "thirteen billion, six hundred thirty-four million, four hundred sixty-five thousand, four hundred twenty-one".