21146027 has 8 divisors (see below), whose sum is σ = 24220416. Its totient is φ = 18085032.

The previous prime is 21146023. The next prime is 21146033. The reversal of 21146027 is 72064112.

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

It is not a de Polignac number, because 21146027 - 2² = 21146023 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21145993 and 21146011.

It is not an unprimeable number, because it can be changed into a prime (21146023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 308 + ... + 6510.

It is an arithmetic number, because the mean of its divisors is an integer number (3027552).

Almost surely, 2^21146027 is an apocalyptic number.

21146027 is a deficient number, since it is larger than the sum of its proper divisors (3074389).

21146027 is an equidigital number, since it uses as much as digits as its factorization.

21146027 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6697.

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 21146027 is about 4598.4809448338. The cubic root of 21146027 is about 276.5304290452.

The spelling of 21146027 in words is "twenty-one million, one hundred forty-six thousand, twenty-seven".