21896302866 has 32 divisors (see below), whose sum is σ = 43973834688. Its totient is φ = 7268593920.

The previous prime is 21896302861. The next prime is 21896302903. The reversal of 21896302866 is 66820369812.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21896302861) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4571725 + ... + 4576511.

It is an arithmetic number, because the mean of its divisors is an integer number (1374182334).

Almost surely, 2^21896302866 is an apocalyptic number.

21896302866 is an abundant number, since it is smaller than the sum of its proper divisors (22077531822).

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

21896302866 is a wasteful number, since it uses less digits than its factorization.

21896302866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7786.

The product of its (nonzero) digits is 1492992, while the sum is 51.

The spelling of 21896302866 in words is "twenty-one billion, eight hundred ninety-six million, three hundred two thousand, eight hundred sixty-six".