21671050258 has 16 divisors (see below), whose sum is σ = 38189543616. Its totient is φ = 9092748240.

The previous prime is 21671050249. The next prime is 21671050301. The reversal of 21671050258 is 85205017612.

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 7 ways as a sum of consecutive naturals, for example, 37886166 + ... + 37886737.

It is an arithmetic number, because the mean of its divisors is an integer number (2386846476).

Almost surely, 2^21671050258 is an apocalyptic number.

21671050258 is a deficient number, since it is larger than the sum of its proper divisors (16518493358).

21671050258 is a wasteful number, since it uses less digits than its factorization.

21671050258 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75772929.

The product of its (nonzero) digits is 33600, while the sum is 37.

The spelling of 21671050258 in words is "twenty-one billion, six hundred seventy-one million, fifty thousand, two hundred fifty-eight".