21014617342487 has 8 divisors (see below), whose sum is σ = 21291525047520. Its totient is φ = 20738616046720.

The previous prime is 21014617342451. The next prime is 21014617342489. The reversal of 21014617342487 is 78424371641012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21014617342487 - 2²⁶ = 21014550233623 is a prime.

It is a super-2 number, since 2×21014617342487² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21014617342489) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 226555643 + ... + 226648380.

It is an arithmetic number, because the mean of its divisors is an integer number (2661440630940).

Almost surely, 2^{21014617342487} is an apocalyptic number.

21014617342487 is a deficient number, since it is larger than the sum of its proper divisors (276907705033).

21014617342487 is an equidigital number, since it uses as much as digits as its factorization.

21014617342487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 453204633.

The product of its (nonzero) digits is 1806336, while the sum is 50.

Adding to 21014617342487 its reverse (78424371641012), we get a palindrome (99438988983499).

The spelling of 21014617342487 in words is "twenty-one trillion, fourteen billion, six hundred seventeen million, three hundred forty-two thousand, four hundred eighty-seven".