21301093 has 8 divisors (see below), whose sum is σ = 23340096. Its totient is φ = 19279200.

The previous prime is 21301087. The next prime is 21301097. The reversal of 21301093 is 39010312.

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

It is a cyclic number.

It is not a de Polignac number, because 21301093 - 2²¹ = 19203941 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21301093.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21301097) 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, 1593 + ... + 6718.

It is an arithmetic number, because the mean of its divisors is an integer number (2917512).

Almost surely, 2^21301093 is an apocalyptic number.

It is an amenable number.

21301093 is a deficient number, since it is larger than the sum of its proper divisors (2039003).

21301093 is a wasteful number, since it uses less digits than its factorization.

21301093 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8555.

The product of its (nonzero) digits is 162, while the sum is 19.

The square root of 21301093 is about 4615.3107154340. The cubic root of 21301093 is about 277.2047255583.

It can be divided in two parts, 2130 and 1093, that added together give a palindrome (3223).

The spelling of 21301093 in words is "twenty-one million, three hundred one thousand, ninety-three".