21973847082 has 48 divisors (see below), whose sum is σ = 48804301056. Its totient is φ = 6590073600.

The previous prime is 21973847081. The next prime is 21973847173. The reversal of 21973847082 is 28074837912.

It is not an unprimeable number, because it can be changed into a prime (21973847081) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 85594 + ... + 226437.

It is an arithmetic number, because the mean of its divisors is an integer number (1016756272).

Almost surely, 2^21973847082 is an apocalyptic number.

21973847082 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21973847082 is an abundant number, since it is smaller than the sum of its proper divisors (26830453974).

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

21973847082 is a wasteful number, since it uses less digits than its factorization.

21973847082 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 312155 (or 312144 counting only the distinct ones).

The product of its (nonzero) digits is 1354752, while the sum is 51.

The spelling of 21973847082 in words is "twenty-one billion, nine hundred seventy-three million, eight hundred forty-seven thousand, eighty-two".