21314560 has 88 divisors (see below), whose sum is σ = 53647776. Its totient is φ = 8110080.

The previous prime is 21314551. The next prime is 21314567. The reversal of 21314560 is 6541312.

It is a hoax number, since the sum of its digits (22) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21314567) 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, 117670 + ... + 117850.

It is a vampire number, since it can be written as 4163 ⋅ 5120 (with its own digits).

Almost surely, 2^21314560 is an apocalyptic number.

21314560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21314560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26823888).

21314560 is an abundant number, since it is smaller than the sum of its proper divisors (32333216).

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

21314560 is a wasteful number, since it uses less digits than its factorization.

21314560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229 (or 211 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 21314560 is about 4616.7694332726. The cubic root of 21314560 is about 277.2631314751.

Adding to 21314560 its reverse (6541312), we get a palindrome (27855872).

The spelling of 21314560 in words is "twenty-one million, three hundred fourteen thousand, five hundred sixty".