21119784264 has 64 divisors (see below), whose sum is σ = 59914310400. Its totient is φ = 6890139072.

The previous prime is 21119784187. The next prime is 21119784277. The reversal of 21119784264 is 46248791112.

21119784264 is a `hidden beast` number, since 211 + 1 + 9 + 7 + 8 + 426 + 4 = 666.

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, 1030027 + ... + 1050330.

It is an arithmetic number, because the mean of its divisors is an integer number (936161100).

Almost surely, 2^21119784264 is an apocalyptic number.

21119784264 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21119784264 is an abundant number, since it is smaller than the sum of its proper divisors (38794526136).

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

21119784264 is a wasteful number, since it uses less digits than its factorization.

21119784264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2080419 (or 2080409 counting only the distinct ones).

The product of its digits is 193536, while the sum is 45.

The spelling of 21119784264 in words is "twenty-one billion, one hundred nineteen million, seven hundred eighty-four thousand, two hundred sixty-four".