21160368 has 60 divisors (see below), whose sum is σ = 61804080. Its totient is φ = 6745728.

The previous prime is 21160339. The next prime is 21160379. The reversal of 21160368 is 86306112.

It is a super-2 number, since 2×21160368² = 895522347790848, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 118 + ... + 6506.

It is an arithmetic number, because the mean of its divisors is an integer number (1030068).

Almost surely, 2^21160368 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21160368, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30902040).

21160368 is an abundant number, since it is smaller than the sum of its proper divisors (40643712).

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

21160368 is a wasteful number, since it uses less digits than its factorization.

21160368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6426 (or 6417 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 21160368 is about 4600.0399998261. The cubic root of 21160368 is about 276.5929282043.

It can be divided in two parts, 21160 and 368, that added together give a triangular number (21528 = T₂₀₇).

The spelling of 21160368 in words is "twenty-one million, one hundred sixty thousand, three hundred sixty-eight".