21141340 has 24 divisors (see below), whose sum is σ = 48433392. Its totient is φ = 7687680.

The previous prime is 21141317. The next prime is 21141361. The reversal of 21141340 is 4314112.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47829 + ... + 48268.

It is an arithmetic number, because the mean of its divisors is an integer number (2018058).

Almost surely, 2^21141340 is an apocalyptic number.

21141340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21141340 is an abundant number, since it is smaller than the sum of its proper divisors (27292052).

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

21141340 is a wasteful number, since it uses less digits than its factorization.

21141340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96117 (or 96115 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 21141340 is about 4597.9712917764. The cubic root of 21141340 is about 276.5099966193.

Adding to 21141340 its reverse (4314112), we get a palindrome (25455452).

The spelling of 21141340 in words is "twenty-one million, one hundred forty-one thousand, three hundred forty".