21274111264 has 48 divisors (see below), whose sum is σ = 48843648000. Its totient is φ = 9117471552.

The previous prime is 21274111259. The next prime is 21274111301. The reversal of 21274111264 is 46211147212.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 958144 + ... + 980095.

It is an arithmetic number, because the mean of its divisors is an integer number (1017576000).

Almost surely, 2^21274111264 is an apocalyptic number.

It is an amenable number.

21274111264 is an abundant number, since it is smaller than the sum of its proper divisors (27569536736).

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

21274111264 is an equidigital number, since it uses as much as digits as its factorization.

21274111264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1938270 (or 1938248 counting only the distinct ones).

The product of its digits is 5376, while the sum is 31.

Adding to 21274111264 its reverse (46211147212), we get a palindrome (67485258476).

The spelling of 21274111264 in words is "twenty-one billion, two hundred seventy-four million, one hundred eleven thousand, two hundred sixty-four".