21677703671 has 32 divisors (see below), whose sum is σ = 24200467200. Its totient is φ = 19288281600.

The previous prime is 21677703643. The next prime is 21677703679. The reversal of 21677703671 is 17630777612.

It is a cyclic number.

It is not a de Polignac number, because 21677703671 - 2¹⁰ = 21677702647 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21677703679) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 30923621 + ... + 30924321.

It is an arithmetic number, because the mean of its divisors is an integer number (756264600).

Almost surely, 2^21677703671 is an apocalyptic number.

21677703671 is a deficient number, since it is larger than the sum of its proper divisors (2522763529).

21677703671 is a wasteful number, since it uses less digits than its factorization.

21677703671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1259.

The product of its (nonzero) digits is 518616, while the sum is 47.

The spelling of 21677703671 in words is "twenty-one billion, six hundred seventy-seven million, seven hundred three thousand, six hundred seventy-one".