21683104877 has 16 divisors (see below), whose sum is σ = 25158259200. Its totient is φ = 18302513328.

The previous prime is 21683104873. The next prime is 21683104909. The reversal of 21683104877 is 77840138612.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 21683104877 - 2² = 21683104873 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21683104873) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2386898 + ... + 2395964.

It is an arithmetic number, because the mean of its divisors is an integer number (1572391200).

Almost surely, 2^21683104877 is an apocalyptic number.

It is an amenable number.

21683104877 is a deficient number, since it is larger than the sum of its proper divisors (3475154323).

21683104877 is an equidigital number, since it uses as much as digits as its factorization.

21683104877 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14240.

The product of its (nonzero) digits is 451584, while the sum is 47.

The spelling of 21683104877 in words is "twenty-one billion, six hundred eighty-three million, one hundred four thousand, eight hundred seventy-seven".