21319597986 has 8 divisors (see below), whose sum is σ = 42639195984. Its totient is φ = 7106532660.

The previous prime is 21319597973. The next prime is 21319598009. The reversal of 21319597986 is 68979591312.

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

21319597986 is an admirable number.

It is a super-3 number, since 3×21319597986³ (a number of 32 digits) contains 333 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1776633160 + ... + 1776633171.

It is an arithmetic number, because the mean of its divisors is an integer number (5329899498).

Almost surely, 2^21319597986 is an apocalyptic number.

21319597986 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21319597986 is a wasteful number, since it uses less digits than its factorization.

21319597986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3553266336.

The product of its digits is 7348320, while the sum is 60.

The spelling of 21319597986 in words is "twenty-one billion, three hundred nineteen million, five hundred ninety-seven thousand, nine hundred eighty-six".