21861852682 has 32 divisors (see below), whose sum is σ = 34787449728. Its totient is φ = 10282669056.

The previous prime is 21861852673. The next prime is 21861852689. The reversal of 21861852682 is 28625816812.

It is not an unprimeable number, because it can be changed into a prime (21861852689) 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, 1176153 + ... + 1194595.

It is an arithmetic number, because the mean of its divisors is an integer number (1087107804).

Almost surely, 2^21861852682 is an apocalyptic number.

21861852682 is a deficient number, since it is larger than the sum of its proper divisors (12925597046).

21861852682 is a wasteful number, since it uses less digits than its factorization.

21861852682 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18894.

The product of its digits is 737280, while the sum is 49.

The spelling of 21861852682 in words is "twenty-one billion, eight hundred sixty-one million, eight hundred fifty-two thousand, six hundred eighty-two".