21674277506 has 48 divisors (see below), whose sum is σ = 38151933120. Its totient is φ = 9207525600.

The previous prime is 21674277479. The next prime is 21674277523. The reversal of 21674277506 is 60577247612.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16659056 + ... + 16660356.

It is an arithmetic number, because the mean of its divisors is an integer number (794831940).

Almost surely, 2^21674277506 is an apocalyptic number.

21674277506 is a deficient number, since it is larger than the sum of its proper divisors (16477655614).

21674277506 is a wasteful number, since it uses less digits than its factorization.

21674277506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2679 (or 2672 counting only the distinct ones).

The product of its (nonzero) digits is 987840, while the sum is 47.

The spelling of 21674277506 in words is "twenty-one billion, six hundred seventy-four million, two hundred seventy-seven thousand, five hundred six".