21671747674 has 16 divisors (see below), whose sum is σ = 32591508768. Its totient is φ = 10807944912.

The previous prime is 21671747639. The next prime is 21671747701. The reversal of 21671747674 is 47674717612.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1444777 + ... + 1459699.

It is an arithmetic number, because the mean of its divisors is an integer number (2036969298).

Almost surely, 2^21671747674 is an apocalyptic number.

21671747674 is a deficient number, since it is larger than the sum of its proper divisors (10919761094).

21671747674 is a wasteful number, since it uses less digits than its factorization.

21671747674 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16749.

The product of its digits is 2765952, while the sum is 52.

The spelling of 21671747674 in words is "twenty-one billion, six hundred seventy-one million, seven hundred forty-seven thousand, six hundred seventy-four".