21214036536402 has 64 divisors (see below), whose sum is σ = 44705763648000. Its totient is φ = 6692476589568.

The previous prime is 21214036536401. The next prime is 21214036536403. The reversal of 21214036536402 is 20463563041212.

It is an interprime number because it is at equal distance from previous prime (21214036536401) and next prime (21214036536403).

It is a super-2 number, since 2×21214036536402² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21214036536401) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 877362349 + ... + 877386527.

It is an arithmetic number, because the mean of its divisors is an integer number (698527557000).

Almost surely, 2^{21214036536402} is an apocalyptic number.

21214036536402 is an abundant number, since it is smaller than the sum of its proper divisors (23491727111598).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21214036536402 is a wasteful number, since it uses less digits than its factorization.

21214036536402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31575.

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

Adding to 21214036536402 its reverse (20463563041212), we get a palindrome (41677599577614).

The spelling of 21214036536402 in words is "twenty-one trillion, two hundred fourteen billion, thirty-six million, five hundred thirty-six thousand, four hundred two".