21460357 has 4 divisors (see below), whose sum is σ = 22393440. Its totient is φ = 20527276.

The previous prime is 21460331. The next prime is 21460363. The reversal of 21460357 is 75306412.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21460357 - 2¹¹ = 21458309 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 (21460057) 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 3 ways as a sum of consecutive naturals, for example, 466507 + ... + 466552.

It is an arithmetic number, because the mean of its divisors is an integer number (5598360).

Almost surely, 2^21460357 is an apocalyptic number.

It is an amenable number.

21460357 is a deficient number, since it is larger than the sum of its proper divisors (933083).

21460357 is an equidigital number, since it uses as much as digits as its factorization.

21460357 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 933082.

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 21460357 is about 4632.5324607605. The cubic root of 21460357 is about 277.8938788923.

Adding to 21460357 its reverse (75306412), we get a palindrome (96766769).

The spelling of 21460357 in words is "twenty-one million, four hundred sixty thousand, three hundred fifty-seven".