21847440675 has 24 divisors (see below), whose sum is σ = 37691587584. Its totient is φ = 11145360160.

The previous prime is 21847440649. The next prime is 21847440677. The reversal of 21847440675 is 57604474812.

It is not a de Polignac number, because 21847440675 - 2¹⁸ = 21847178531 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21847440677) 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, 6330867 + ... + 6334316.

It is an arithmetic number, because the mean of its divisors is an integer number (1570482816).

Almost surely, 2^21847440675 is an apocalyptic number.

21847440675 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

21847440675 is a deficient number, since it is larger than the sum of its proper divisors (15844146909).

21847440675 is a wasteful number, since it uses less digits than its factorization.

21847440675 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12665219 (or 12665214 counting only the distinct ones).

The product of its (nonzero) digits is 1505280, while the sum is 48.

The spelling of 21847440675 in words is "twenty-one billion, eight hundred forty-seven million, four hundred forty thousand, six hundred seventy-five".