21314502 has 64 divisors (see below), whose sum is σ = 52427520. Its totient is φ = 6444360.

The previous prime is 21314497. The next prime is 21314543. The reversal of 21314502 is 20541312.

21314502 is a `hidden beast` number, since 213 + 1 + 450 + 2 = 666.

It is a hoax number, since the sum of its digits (18) coincides with the sum of the digits of its distinct prime factors.

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

It is a zygodrome in base 3.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 47893 + ... + 48335.

It is an arithmetic number, because the mean of its divisors is an integer number (819180).

Almost surely, 2^21314502 is an apocalyptic number.

21314502 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 21314502, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26213760).

21314502 is an abundant number, since it is smaller than the sum of its proper divisors (31113018).

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

21314502 is an equidigital number, since it uses as much as digits as its factorization.

21314502 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 477 (or 459 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 21314502 is about 4616.7631518197. The cubic root of 21314502 is about 277.2628799838.

Adding to 21314502 its reverse (20541312), we get a palindrome (41855814).

The spelling of 21314502 in words is "twenty-one million, three hundred fourteen thousand, five hundred two".