21168059 has 8 divisors (see below), whose sum is σ = 23132928. Its totient is φ = 19209960.

The previous prime is 21168053. The next prime is 21168101. The reversal of 21168059 is 95086112.

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

It is not a de Polignac number, because 21168059 - 2⁸ = 21167803 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21168053) by changing a digit.

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, 6674 + ... + 9320.

It is an arithmetic number, because the mean of its divisors is an integer number (2891616).

Almost surely, 2^21168059 is an apocalyptic number.

21168059 is a deficient number, since it is larger than the sum of its proper divisors (1964869).

21168059 is a wasteful number, since it uses less digits than its factorization.

21168059 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3385.

The product of its (nonzero) digits is 4320, while the sum is 32.

The square root of 21168059 is about 4600.8758948705. The cubic root of 21168059 is about 276.6264345298.

The spelling of 21168059 in words is "twenty-one million, one hundred sixty-eight thousand, fifty-nine".