21082089290 has 8 divisors (see below), whose sum is σ = 37947760740. Its totient is φ = 8432835712.

The previous prime is 21082089269. The next prime is 21082089311. The reversal of 21082089290 is 9298028012.

It is an interprime number because it is at equal distance from previous prime (21082089269) and next prime (21082089311).

It can be written as a sum of positive squares in 2 ways, for example, as 20167692169 + 914397121 = 142013^2 + 30239^2 .

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

It is an unprimeable number.

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, 1054104455 + ... + 1054104474.

Almost surely, 2^21082089290 is an apocalyptic number.

21082089290 is a deficient number, since it is larger than the sum of its proper divisors (16865671450).

21082089290 is a wasteful number, since it uses less digits than its factorization.

21082089290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2108208936.

The product of its (nonzero) digits is 41472, while the sum is 41.

The spelling of 21082089290 in words is "twenty-one billion, eighty-two million, eighty-nine thousand, two hundred ninety".