21179104 has 24 divisors (see below), whose sum is σ = 42009408. Its totient is φ = 10510080.

The previous prime is 21179099. The next prime is 21179111. The reversal of 21179104 is 40197112.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1969 + ... + 6799.

It is an arithmetic number, because the mean of its divisors is an integer number (1750392).

Almost surely, 2^21179104 is an apocalyptic number.

It is an amenable number.

21179104 is a deficient number, since it is larger than the sum of its proper divisors (20830304).

21179104 is a wasteful number, since it uses less digits than its factorization.

21179104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4978 (or 4970 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 25.

The square root of 21179104 is about 4602.0760532612. The cubic root of 21179104 is about 276.6745385738.

The spelling of 21179104 in words is "twenty-one million, one hundred seventy-nine thousand, one hundred four".