21579103 has 48 divisors (see below), whose sum is σ = 30041280. Its totient is φ = 15095808.

The previous prime is 21579097. The next prime is 21579113. The reversal of 21579103 is 30197512.

It is a de Polignac number, because none of the positive numbers 2^k-21579103 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21579113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 583201 + ... + 583237.

It is an arithmetic number, because the mean of its divisors is an integer number (625860).

Almost surely, 2^21579103 is an apocalyptic number.

21579103 is a deficient number, since it is larger than the sum of its proper divisors (8462177).

21579103 is a wasteful number, since it uses less digits than its factorization.

21579103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116 (or 103 counting only the distinct ones).

The product of its (nonzero) digits is 1890, while the sum is 28.

The square root of 21579103 is about 4645.3313121886. The cubic root of 21579103 is about 278.4054905925.

The spelling of 21579103 in words is "twenty-one million, five hundred seventy-nine thousand, one hundred three".