21127030 has 8 divisors (see below), whose sum is σ = 38028672. Its totient is φ = 8450808.

The previous prime is 21127021. The next prime is 21127033. The reversal of 21127030 is 3072112.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 21126995 and 21127013.

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 polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1056342 + ... + 1056361.

It is an arithmetic number, because the mean of its divisors is an integer number (4753584).

Almost surely, 2^21127030 is an apocalyptic number.

21127030 is a deficient number, since it is larger than the sum of its proper divisors (16901642).

21127030 is a wasteful number, since it uses less digits than its factorization.

21127030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2112710.

The product of its (nonzero) digits is 84, while the sum is 16.

The square root of 21127030 is about 4596.4149072946. The cubic root of 21127030 is about 276.4475951639.

Adding to 21127030 its reverse (3072112), we get a palindrome (24199142).

The spelling of 21127030 in words is "twenty-one million, one hundred twenty-seven thousand, thirty".