21214036536250 has 80 divisors (see below), whose sum is σ = 43299736524000. Its totient is φ = 7761796056000.

The previous prime is 21214036536241. The next prime is 21214036536257. The reversal of 21214036536250 is 5263563041212.

It is a super-2 number, since 2×21214036536250² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21214036536257) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 14711640 + ... + 16089139.

It is an arithmetic number, because the mean of its divisors is an integer number (541246706550).

Almost surely, 2^{21214036536250} is an apocalyptic number.

21214036536250 is an abundant number, since it is smaller than the sum of its proper divisors (22085699987750).

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

21214036536250 is a wasteful number, since it uses less digits than its factorization.

21214036536250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30800849 (or 30800834 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 40.

Adding to 21214036536250 its reverse (5263563041212), we get a palindrome (26477599577462).

The spelling of 21214036536250 in words is "twenty-one trillion, two hundred fourteen billion, thirty-six million, five hundred thirty-six thousand, two hundred fifty".