21471160 has 16 divisors (see below), whose sum is σ = 48310200. Its totient is φ = 8588448.

The previous prime is 21471157. The next prime is 21471193. The reversal of 21471160 is 6117412.

It is a super-2 number, since 2×21471160² = 922021423491200, which contains 22 as substring.

It is a plaindrome in base 11.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 268350 + ... + 268429.

Almost surely, 2^21471160 is an apocalyptic number.

21471160 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21471160 is an abundant number, since it is smaller than the sum of its proper divisors (26839040).

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

21471160 is a wasteful number, since it uses less digits than its factorization.

21471160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 536790 (or 536786 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 22.

The square root of 21471160 is about 4633.6983069682. The cubic root of 21471160 is about 277.9405010427.

Adding to 21471160 its reverse (6117412), we get a palindrome (27588572).

The spelling of 21471160 in words is "twenty-one million, four hundred seventy-one thousand, one hundred sixty".