21840863496 has 64 divisors (see below), whose sum is σ = 58011681600. Its totient is φ = 6839255808.

The previous prime is 21840863453. The next prime is 21840863521. The reversal of 21840863496 is 69436804812.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 398310 + ... + 449813.

It is an arithmetic number, because the mean of its divisors is an integer number (906432525).

Almost surely, 2^21840863496 is an apocalyptic number.

It is an amenable number.

21840863496 is an abundant number, since it is smaller than the sum of its proper divisors (36170818104).

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

21840863496 is a wasteful number, since it uses less digits than its factorization.

21840863496 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 848198 (or 848194 counting only the distinct ones).

The product of its (nonzero) digits is 1990656, while the sum is 51.

The spelling of 21840863496 in words is "twenty-one billion, eight hundred forty million, eight hundred sixty-three thousand, four hundred ninety-six".