21893391169 has 8 divisors (see below), whose sum is σ = 23593248000. Its totient is φ = 20195784336.

The previous prime is 21893391161. The next prime is 21893391181. The reversal of 21893391169 is 96119339812.

It is a happy number.

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

It is not a de Polignac number, because 21893391169 - 2³ = 21893391161 is a prime.

It is a super-2 number, since 2×21893391169² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21893391161) 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, 542257 + ... + 581230.

It is an arithmetic number, because the mean of its divisors is an integer number (2949156000).

Almost surely, 2^21893391169 is an apocalyptic number.

It is an amenable number.

21893391169 is a deficient number, since it is larger than the sum of its proper divisors (1699856831).

21893391169 is a wasteful number, since it uses less digits than its factorization.

21893391169 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1124999.

The product of its digits is 629856, while the sum is 52.

The spelling of 21893391169 in words is "twenty-one billion, eight hundred ninety-three million, three hundred ninety-one thousand, one hundred sixty-nine".