21214036504365 has 32 divisors (see below), whose sum is σ = 34675598136960. Its totient is φ = 11070917534976.

The previous prime is 21214036504361. The next prime is 21214036504447. The reversal of 21214036504365 is 56340563041212.

It is not a de Polignac number, because 21214036504365 - 2² = 21214036504361 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21214036504361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 35473335 + ... + 36066404.

It is an arithmetic number, because the mean of its divisors is an integer number (1083612441780).

Almost surely, 2^{21214036504365} is an apocalyptic number.

It is an amenable number.

21214036504365 is a deficient number, since it is larger than the sum of its proper divisors (13461561632595).

21214036504365 is a wasteful number, since it uses less digits than its factorization.

21214036504365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71540173.

The product of its (nonzero) digits is 518400, while the sum is 42.

Adding to 21214036504365 its reverse (56340563041212), we get a palindrome (77554599545577).

The spelling of 21214036504365 in words is "twenty-one trillion, two hundred fourteen billion, thirty-six million, five hundred four thousand, three hundred sixty-five".