21086274338 has 8 divisors (see below), whose sum is σ = 32649715200. Its totient is φ = 10203035940.

The previous prime is 21086274331. The next prime is 21086274389. The reversal of 21086274338 is 83347268012.

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

It is not an unprimeable number, because it can be changed into a prime (21086274331) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 170050538 + ... + 170050661.

It is an arithmetic number, because the mean of its divisors is an integer number (4081214400).

Almost surely, 2^21086274338 is an apocalyptic number.

21086274338 is a deficient number, since it is larger than the sum of its proper divisors (11563440862).

21086274338 is a wasteful number, since it uses less digits than its factorization.

21086274338 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 340101232.

The product of its (nonzero) digits is 387072, while the sum is 44.

The spelling of 21086274338 in words is "twenty-one billion, eighty-six million, two hundred seventy-four thousand, three hundred thirty-eight".