21495416 has 16 divisors (see below), whose sum is σ = 40488000. Its totient is φ = 10698624.

The previous prime is 21495413. The next prime is 21495433. The reversal of 21495416 is 61459412.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21495413) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4241 + ... + 7808.

It is an arithmetic number, because the mean of its divisors is an integer number (2530500).

Almost surely, 2^21495416 is an apocalyptic number.

It is an amenable number.

21495416 is a deficient number, since it is larger than the sum of its proper divisors (18992584).

21495416 is a wasteful number, since it uses less digits than its factorization.

21495416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12278 (or 12274 counting only the distinct ones).

The product of its digits is 8640, while the sum is 32.

The square root of 21495416 is about 4636.3149159650. The cubic root of 21495416 is about 278.0451249145.

The spelling of 21495416 in words is "twenty-one million, four hundred ninety-five thousand, four hundred sixteen".