13640021463 has 4 divisors (see below), whose sum is σ = 18186695288. Its totient is φ = 9093347640.

The previous prime is 13640021441. The next prime is 13640021467. The reversal of 13640021463 is 36412004631.

13640021463 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 13640021463 - 2¹² = 13640017367 is a prime.

It is a super-2 number, since 2×13640021463² (a number of 21 digits) contains 22 as substring.

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 13640021463.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13640021467) 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 in 3 ways as a sum of consecutive naturals, for example, 2273336908 + ... + 2273336913.

It is an arithmetic number, because the mean of its divisors is an integer number (4546673822).

Almost surely, 2^13640021463 is an apocalyptic number.

13640021463 is a deficient number, since it is larger than the sum of its proper divisors (4546673825).

13640021463 is an equidigital number, since it uses as much as digits as its factorization.

13640021463 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4546673824.

The product of its (nonzero) digits is 10368, while the sum is 30.

The spelling of 13640021463 in words is "thirteen billion, six hundred forty million, twenty-one thousand, four hundred sixty-three".