21160460 has 48 divisors (see below), whose sum is σ = 46823616. Its totient is φ = 8017152.

The previous prime is 21160457. The next prime is 21160501. The reversal of 21160460 is 6406112.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 72074 + ... + 72366.

It is an arithmetic number, because the mean of its divisors is an integer number (975492).

Almost surely, 2^21160460 is an apocalyptic number.

21160460 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 21160460, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23411808).

21160460 is an abundant number, since it is smaller than the sum of its proper divisors (25663156).

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

21160460 is a wasteful number, since it uses less digits than its factorization.

21160460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 482 (or 480 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 21160460 is about 4600.0499997283. The cubic root of 21160460 is about 276.5933290561.

Adding to 21160460 its reverse (6406112), we get a palindrome (27566572).

The spelling of 21160460 in words is "twenty-one million, one hundred sixty thousand, four hundred sixty".