21764196264 has 32 divisors (see below), whose sum is σ = 54420300000. Its totient is φ = 7253424192.

The previous prime is 21764196227. The next prime is 21764196281. The reversal of 21764196264 is 46269146712.

It is a happy number.

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 7 ways as a sum of consecutive naturals, for example, 59107 + ... + 216845.

It is an arithmetic number, because the mean of its divisors is an integer number (1700634375).

Almost surely, 2^21764196264 is an apocalyptic number.

21764196264 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21764196264 is an abundant number, since it is smaller than the sum of its proper divisors (32656103736).

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

21764196264 is a wasteful number, since it uses less digits than its factorization.

21764196264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163497 (or 163493 counting only the distinct ones).

The product of its digits is 870912, while the sum is 48.

The spelling of 21764196264 in words is "twenty-one billion, seven hundred sixty-four million, one hundred ninety-six thousand, two hundred sixty-four".