21127032 has 24 divisors (see below), whose sum is σ = 57219240. Its totient is φ = 7042320.

The previous prime is 21127021. The next prime is 21127033. The reversal of 21127032 is 23072112.

It is a tau number, because it is divible by the number of its divisors (24).

It is a super-2 number, since 2×21127032² = 892702962258048, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 21126996 and 21127014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21127033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 146644 + ... + 146787.

It is an arithmetic number, because the mean of its divisors is an integer number (2384135).

Almost surely, 2^21127032 is an apocalyptic number.

It is an amenable number.

21127032 is an abundant number, since it is smaller than the sum of its proper divisors (36092208).

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

21127032 is a wasteful number, since it uses less digits than its factorization.

21127032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 293443 (or 293436 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 18.

The square root of 21127032 is about 4596.4151248555. The cubic root of 21127032 is about 276.4476038873.

Adding to 21127032 its reverse (23072112), we get a palindrome (44199144).

The spelling of 21127032 in words is "twenty-one million, one hundred twenty-seven thousand, thirty-two".