21114678 has 16 divisors (see below), whose sum is σ = 45477936. Its totient is φ = 6496800.

The previous prime is 21114673. The next prime is 21114683. The reversal of 21114678 is 87641112.

It is an interprime number because it is at equal distance from previous prime (21114673) and next prime (21114683).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21114671) 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, 135273 + ... + 135428.

It is an arithmetic number, because the mean of its divisors is an integer number (2842371).

Almost surely, 2^21114678 is an apocalyptic number.

21114678 is an abundant number, since it is smaller than the sum of its proper divisors (24363258).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21114678 is a wasteful number, since it uses less digits than its factorization.

21114678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 270719.

The product of its digits is 2688, while the sum is 30.

The square root of 21114678 is about 4595.0710549457. The cubic root of 21114678 is about 276.3937092749.

The spelling of 21114678 in words is "twenty-one million, one hundred fourteen thousand, six hundred seventy-eight".