21110532 has 24 divisors (see below), whose sum is σ = 52155936. Its totient is φ = 6622848.

The previous prime is 21110513. The next prime is 21110543. The reversal of 21110532 is 23501112.

It is a super-2 number, since 2×21110532² = 891309122646048, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51538 + ... + 51945.

It is an arithmetic number, because the mean of its divisors is an integer number (2173164).

Almost surely, 2^21110532 is an apocalyptic number.

It is an amenable number.

21110532 is an abundant number, since it is smaller than the sum of its proper divisors (31045404).

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

21110532 is a wasteful number, since it uses less digits than its factorization.

21110532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103507 (or 103505 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 15.

The square root of 21110532 is about 4594.6198972276. The cubic root of 21110532 is about 276.3756175422.

Adding to 21110532 its reverse (23501112), we get a palindrome (44611644).

The spelling of 21110532 in words is "twenty-one million, one hundred ten thousand, five hundred thirty-two".