21348120 has 64 divisors (see below), whose sum is σ = 64948320. Its totient is φ = 5612544.

The previous prime is 21348101. The next prime is 21348127. The reversal of 21348120 is 2184312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21348127) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 7542 + ... + 9978.

Almost surely, 2^21348120 is an apocalyptic number.

21348120 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 21348120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32474160).

21348120 is an abundant number, since it is smaller than the sum of its proper divisors (43600200).

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

21348120 is a wasteful number, since it uses less digits than its factorization.

21348120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2524 (or 2520 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 21348120 is about 4620.4025798625. The cubic root of 21348120 is about 277.4085730790.

The spelling of 21348120 in words is "twenty-one million, three hundred forty-eight thousand, one hundred twenty".