21807114 has 16 divisors (see below), whose sum is σ = 49844928. Its totient is φ = 6230592.

The previous prime is 21807113. The next prime is 21807119. The reversal of 21807114 is 41170812.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21807113) 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, 259567 + ... + 259650.

It is an arithmetic number, because the mean of its divisors is an integer number (3115308).

Almost surely, 2^21807114 is an apocalyptic number.

21807114 is an abundant number, since it is smaller than the sum of its proper divisors (28037814).

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

21807114 is a wasteful number, since it uses less digits than its factorization.

21807114 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 519229.

The product of its (nonzero) digits is 448, while the sum is 24.

The square root of 21807114 is about 4669.8087755282. The cubic root of 21807114 is about 279.3826278515.

Adding to 21807114 its reverse (41170812), we get a palindrome (62977926).

The spelling of 21807114 in words is "twenty-one million, eight hundred seven thousand, one hundred fourteen".