21160347 has 16 divisors (see below), whose sum is σ = 30512160. Its totient is φ = 12966912.

The previous prime is 21160339. The next prime is 21160379. The reversal of 21160347 is 74306112.

It is not a de Polignac number, because 21160347 - 2³ = 21160339 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21160397) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9483 + ... + 11499.

It is an arithmetic number, because the mean of its divisors is an integer number (1907010).

Almost surely, 2^21160347 is an apocalyptic number.

21160347 is a deficient number, since it is larger than the sum of its proper divisors (9351813).

21160347 is a wasteful number, since it uses less digits than its factorization.

21160347 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2302.

The product of its (nonzero) digits is 1008, while the sum is 24.

The square root of 21160347 is about 4600.0377172367. The cubic root of 21160347 is about 276.5928367054.

Adding to 21160347 its reverse (74306112), we get a palindrome (95466459).

The spelling of 21160347 in words is "twenty-one million, one hundred sixty thousand, three hundred forty-seven".