21460353 has 8 divisors (see below), whose sum is σ = 28740768. Its totient is φ = 14243424.

The previous prime is 21460331. The next prime is 21460363. The reversal of 21460353 is 35306412.

It is a happy number.

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

It is not a de Polignac number, because 21460353 - 2¹² = 21456257 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21460363) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15076 + ... + 16437.

It is an arithmetic number, because the mean of its divisors is an integer number (3592596).

Almost surely, 2^21460353 is an apocalyptic number.

It is an amenable number.

21460353 is a deficient number, since it is larger than the sum of its proper divisors (7280415).

21460353 is a wasteful number, since it uses less digits than its factorization.

21460353 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31743.

The product of its (nonzero) digits is 2160, while the sum is 24.

The square root of 21460353 is about 4632.5320290312. The cubic root of 21460353 is about 277.8938616268.

Adding to 21460353 its reverse (35306412), we get a palindrome (56766765).

The spelling of 21460353 in words is "twenty-one million, four hundred sixty thousand, three hundred fifty-three".