21896298264 has 32 divisors (see below), whose sum is σ = 57120779520. Its totient is φ = 6981428256.

The previous prime is 21896298251. The next prime is 21896298271. The reversal of 21896298264 is 46289269812.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19833052 + ... + 19834155.

It is an arithmetic number, because the mean of its divisors is an integer number (1785024360).

Almost surely, 2^21896298264 is an apocalyptic number.

21896298264 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21896298264 is an abundant number, since it is smaller than the sum of its proper divisors (35224481256).

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

21896298264 is a wasteful number, since it uses less digits than its factorization.

21896298264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39667239 (or 39667235 counting only the distinct ones).

The product of its digits is 5971968, while the sum is 57.

The spelling of 21896298264 in words is "twenty-one billion, eight hundred ninety-six million, two hundred ninety-eight thousand, two hundred sixty-four".