21293349 has 16 divisors (see below), whose sum is σ = 35397120. Its totient is φ = 11061360.

The previous prime is 21293347. The next prime is 21293351. The reversal of 21293349 is 94339212.

It is an interprime number because it is at equal distance from previous prime (21293347) and next prime (21293351).

It is not a de Polignac number, because 21293349 - 2¹ = 21293347 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21293341) 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 15 ways as a sum of consecutive naturals, for example, 45859 + ... + 46320.

It is an arithmetic number, because the mean of its divisors is an integer number (2212320).

Almost surely, 2^21293349 is an apocalyptic number.

It is an amenable number.

21293349 is a deficient number, since it is larger than the sum of its proper divisors (14103771).

21293349 is a wasteful number, since it uses less digits than its factorization.

21293349 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92200.

The product of its digits is 11664, while the sum is 33.

The square root of 21293349 is about 4614.4716924042. The cubic root of 21293349 is about 277.1711289476.

The spelling of 21293349 in words is "twenty-one million, two hundred ninety-three thousand, three hundred forty-nine".