21060293 has 8 divisors (see below), whose sum is σ = 21838080. Its totient is φ = 20286000.

The previous prime is 21060287. The next prime is 21060313. The reversal of 21060293 is 39206012.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21060293 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 (21000293) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21296 + ... + 22262.

It is an arithmetic number, because the mean of its divisors is an integer number (2729760).

Almost surely, 2^21060293 is an apocalyptic number.

It is an amenable number.

21060293 is a deficient number, since it is larger than the sum of its proper divisors (777787).

21060293 is an equidigital number, since it uses as much as digits as its factorization.

21060293 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1747.

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 21060293 is about 4589.1494854711. The cubic root of 21060293 is about 276.1562031500.

The spelling of 21060293 in words is "twenty-one million, sixty thousand, two hundred ninety-three".