21214036542413 has 24 divisors (see below), whose sum is σ = 25204945311000. Its totient is φ = 17735809956480.

The previous prime is 21214036542407. The next prime is 21214036542421. The reversal of 21214036542413 is 31424563041212.

It can be written as a sum of positive squares in 4 ways, for example, as 1702928431369 + 19511108111044 = 1304963^2 + 4417138^2 .

It is a de Polignac number, because none of the positive numbers 2^k-21214036542413 is a prime.

It is a super-2 number, since 2×21214036542413² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21214036542403) 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 23 ways as a sum of consecutive naturals, for example, 24644438 + ... + 25490711.

It is an arithmetic number, because the mean of its divisors is an integer number (1050206054625).

Almost surely, 2^{21214036542413} is an apocalyptic number.

It is an amenable number.

21214036542413 is a deficient number, since it is larger than the sum of its proper divisors (3990908768587).

21214036542413 is a wasteful number, since it uses less digits than its factorization.

21214036542413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50135453 (or 50135442 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 38.

Adding to 21214036542413 its reverse (31424563041212), we get a palindrome (52638599583625).

The spelling of 21214036542413 in words is "twenty-one trillion, two hundred fourteen billion, thirty-six million, five hundred forty-two thousand, four hundred thirteen".