21673877641 has 8 divisors (see below), whose sum is σ = 23342304384. Its totient is φ = 20005623120.

The previous prime is 21673877623. The next prime is 21673877653. The reversal of 21673877641 is 14677837612.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21673877641 - 2⁷ = 21673877513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21673877041) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 354000 + ... + 410686.

It is an arithmetic number, because the mean of its divisors is an integer number (2917788048).

Almost surely, 2^21673877641 is an apocalyptic number.

It is an amenable number.

21673877641 is a deficient number, since it is larger than the sum of its proper divisors (1668426743).

21673877641 is a wasteful number, since it uses less digits than its factorization.

21673877641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86111.

The product of its digits is 2370816, while the sum is 52.

The spelling of 21673877641 in words is "twenty-one billion, six hundred seventy-three million, eight hundred seventy-seven thousand, six hundred forty-one".