21414128 has 20 divisors (see below), whose sum is σ = 41727240. Its totient is φ = 10645824.

The previous prime is 21414119. The next prime is 21414193. The reversal of 21414128 is 82141412.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 875 + ... + 6602.

It is an arithmetic number, because the mean of its divisors is an integer number (2086362).

Almost surely, 2^21414128 is an apocalyptic number.

It is an amenable number.

21414128 is a deficient number, since it is larger than the sum of its proper divisors (20313112).

21414128 is a wasteful number, since it uses less digits than its factorization.

21414128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7664 (or 7658 counting only the distinct ones).

The product of its digits is 512, while the sum is 23.

The square root of 21414128 is about 4627.5401673027. The cubic root of 21414128 is about 277.6941929966.

The spelling of 21414128 in words is "twenty-one million, four hundred fourteen thousand, one hundred twenty-eight".