21799675361 has 4 divisors (see below), whose sum is σ = 21944044224. Its totient is φ = 21655306500.

The previous prime is 21799675321. The next prime is 21799675369. The reversal of 21799675361 is 16357699712.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21799675361 - 2²⁶ = 21732566497 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21799675297 and 21799675306.

It is not an unprimeable number, because it can be changed into a prime (21799675369) 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 3 ways as a sum of consecutive naturals, for example, 72184205 + ... + 72184506.

It is an arithmetic number, because the mean of its divisors is an integer number (5486011056).

Almost surely, 2^21799675361 is an apocalyptic number.

It is an amenable number.

21799675361 is a deficient number, since it is larger than the sum of its proper divisors (144368863).

21799675361 is a wasteful number, since it uses less digits than its factorization.

21799675361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144368862.

The product of its digits is 4286520, while the sum is 56.

The spelling of 21799675361 in words is "twenty-one billion, seven hundred ninety-nine million, six hundred seventy-five thousand, three hundred sixty-one".