21350349 has 12 divisors (see below), whose sum is σ = 30884412. Its totient is φ = 14212800.

The previous prime is 21350341. The next prime is 21350363. The reversal of 21350349 is 94305312.

It can be written as a sum of positive squares in 2 ways, for example, as 4334724 + 17015625 = 2082^2 + 4125^2 .

It is not a de Polignac number, because 21350349 - 2³ = 21350341 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21350341) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7209 + ... + 9729.

It is an arithmetic number, because the mean of its divisors is an integer number (2573701).

Almost surely, 2^21350349 is an apocalyptic number.

It is an amenable number.

21350349 is a deficient number, since it is larger than the sum of its proper divisors (9534063).

21350349 is a wasteful number, since it uses less digits than its factorization.

21350349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3468 (or 3465 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 27.

The square root of 21350349 is about 4620.6437863138. The cubic root of 21350349 is about 277.4182276714.

The spelling of 21350349 in words is "twenty-one million, three hundred fifty thousand, three hundred forty-nine".