21138950282 has 8 divisors (see below), whose sum is σ = 32731277952. Its totient is φ = 10228524300.

The previous prime is 21138950267. The next prime is 21138950291. The reversal of 21138950282 is 28205983112.

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 (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 170475344 + ... + 170475467.

It is an arithmetic number, because the mean of its divisors is an integer number (4091409744).

Almost surely, 2^21138950282 is an apocalyptic number.

21138950282 is a deficient number, since it is larger than the sum of its proper divisors (11592327670).

21138950282 is a wasteful number, since it uses less digits than its factorization.

21138950282 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 340950844.

The product of its (nonzero) digits is 69120, while the sum is 41.

The spelling of 21138950282 in words is "twenty-one billion, one hundred thirty-eight million, nine hundred fifty thousand, two hundred eighty-two".