21896410 has 16 divisors (see below), whose sum is σ = 39495456. Its totient is φ = 8740368.

The previous prime is 21896401. The next prime is 21896411. The reversal of 21896410 is 1469812.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (21896411) 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 7 ways as a sum of consecutive naturals, for example, 3469 + ... + 7471.

It is an arithmetic number, because the mean of its divisors is an integer number (2468466).

Almost surely, 2^21896410 is an apocalyptic number.

21896410 is a deficient number, since it is larger than the sum of its proper divisors (17599046).

21896410 is a wasteful number, since it uses less digits than its factorization.

21896410 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4557.

The product of its (nonzero) digits is 3456, while the sum is 31.

The square root of 21896410 is about 4679.3599989742. The cubic root of 21896410 is about 279.7634481699.

The spelling of 21896410 in words is "twenty-one million, eight hundred ninety-six thousand, four hundred ten".