21410380 has 24 divisors (see below), whose sum is σ = 45920448. Its totient is φ = 8381568.

The previous prime is 21410377. The next prime is 21410387. The reversal of 21410380 is 8301412.

It is not an unprimeable number, because it can be changed into a prime (21410387) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10449 + ... + 12328.

It is an arithmetic number, because the mean of its divisors is an integer number (1913352).

Almost surely, 2^21410380 is an apocalyptic number.

21410380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21410380 is an abundant number, since it is smaller than the sum of its proper divisors (24510068).

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

21410380 is a wasteful number, since it uses less digits than its factorization.

21410380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22833 (or 22831 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 21410380 is about 4627.1351828102. The cubic root of 21410380 is about 277.6779909428.

Adding to 21410380 its reverse (8301412), we get a palindrome (29711792).

The spelling of 21410380 in words is "twenty-one million, four hundred ten thousand, three hundred eighty".