21896914908 has 24 divisors (see below), whose sum is σ = 55737601920. Its totient is φ = 6635428720.

The previous prime is 21896914903. The next prime is 21896914937. The reversal of 21896914908 is 80941969812.

It is a hoax number, since the sum of its digits (57) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21896914901) by changing a digit.

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, 82942728 + ... + 82942991.

It is an arithmetic number, because the mean of its divisors is an integer number (2322400080).

Almost surely, 2^21896914908 is an apocalyptic number.

It is an amenable number.

21896914908 is an abundant number, since it is smaller than the sum of its proper divisors (33840687012).

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

21896914908 is a wasteful number, since it uses less digits than its factorization.

21896914908 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165885737 (or 165885735 counting only the distinct ones).

The product of its (nonzero) digits is 2239488, while the sum is 57.

The spelling of 21896914908 in words is "twenty-one billion, eight hundred ninety-six million, nine hundred fourteen thousand, nine hundred eight".