21314838 has 32 divisors (see below), whose sum is σ = 45606240. Its totient is φ = 6617600.

The previous prime is 21314837. The next prime is 21314857. The reversal of 21314838 is 83841312.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21314831) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9268 + ... + 11336.

It is an arithmetic number, because the mean of its divisors is an integer number (1425195).

Almost surely, 2^21314838 is an apocalyptic number.

21314838 is an abundant number, since it is smaller than the sum of its proper divisors (24291402).

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

21314838 is a wasteful number, since it uses less digits than its factorization.

21314838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2192.

The product of its digits is 4608, while the sum is 30.

The square root of 21314838 is about 4616.7995408075. The cubic root of 21314838 is about 277.2643368924.

It can be divided in two parts, 213 and 14838, that added together give a palindrome (15051).

The spelling of 21314838 in words is "twenty-one million, three hundred fourteen thousand, eight hundred thirty-eight".