21410456 has 8 divisors (see below), whose sum is σ = 40144620. Its totient is φ = 10705224.

The previous prime is 21410437. The next prime is 21410471. The reversal of 21410456 is 65401412.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×21410456² = 916815252255872, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 1338146 + ... + 1338161.

Almost surely, 2^21410456 is an apocalyptic number.

It is an amenable number.

21410456 is a deficient number, since it is larger than the sum of its proper divisors (18734164).

21410456 is a wasteful number, since it uses less digits than its factorization.

21410456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2676313 (or 2676309 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 21410456 is about 4627.1433952278. The cubic root of 21410456 is about 277.6783194984.

Adding to 21410456 its reverse (65401412), we get a palindrome (86811868).

The spelling of 21410456 in words is "twenty-one million, four hundred ten thousand, four hundred fifty-six".