21486493389 has 8 divisors (see below), whose sum is σ = 28707007392. Its totient is φ = 14295154160.

The previous prime is 21486493381. The next prime is 21486493393. The reversal of 21486493389 is 98339468412.

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 21486493389 - 2³ = 21486493381 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21486493381) 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 7 ways as a sum of consecutive naturals, for example, 7291974 + ... + 7294919.

It is an arithmetic number, because the mean of its divisors is an integer number (3588375924).

Almost surely, 2^21486493389 is an apocalyptic number.

It is an amenable number.

21486493389 is a deficient number, since it is larger than the sum of its proper divisors (7220514003).

21486493389 is a wasteful number, since it uses less digits than its factorization.

21486493389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14587387.

The product of its digits is 8957952, while the sum is 57.

The spelling of 21486493389 in words is "twenty-one billion, four hundred eighty-six million, four hundred ninety-three thousand, three hundred eighty-nine".