21115314 has 48 divisors (see below), whose sum is σ = 50993280. Its totient is φ = 6259680.

The previous prime is 21115307. The next prime is 21115331. The reversal of 21115314 is 41351112.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8172 + ... + 10440.

It is an arithmetic number, because the mean of its divisors is an integer number (1062360).

Almost surely, 2^21115314 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21115314, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25496640).

21115314 is an abundant number, since it is smaller than the sum of its proper divisors (29877966).

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

21115314 is a wasteful number, since it uses less digits than its factorization.

21115314 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2335 (or 2332 counting only the distinct ones).

The product of its digits is 120, while the sum is 18.

The square root of 21115314 is about 4595.1402590128. The cubic root of 21115314 is about 276.3964843529.

Adding to 21115314 its reverse (41351112), we get a palindrome (62466426).

The spelling of 21115314 in words is "twenty-one million, one hundred fifteen thousand, three hundred fourteen".