21214036533264 has 80 divisors (see below), whose sum is σ = 55500723083520. Its totient is φ = 6981320586240.

The previous prime is 21214036533253. The next prime is 21214036533271. The reversal of 21214036533264 is 46233563041212.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53105154 + ... + 53503134.

It is an arithmetic number, because the mean of its divisors is an integer number (693759038544).

Almost surely, 2^{21214036533264} is an apocalyptic number.

21214036533264 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21214036533264 is an abundant number, since it is smaller than the sum of its proper divisors (34286686550256).

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

21214036533264 is a wasteful number, since it uses less digits than its factorization.

21214036533264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 412128 (or 412122 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 42.

Adding to 21214036533264 its reverse (46233563041212), we get a palindrome (67447599574476).

The spelling of 21214036533264 in words is "twenty-one trillion, two hundred fourteen billion, thirty-six million, five hundred thirty-three thousand, two hundred sixty-four".