21076270 has 8 divisors (see below), whose sum is σ = 37937304. Its totient is φ = 8430504.

The previous prime is 21076267. The next prime is 21076271. The reversal of 21076270 is 7267012.

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

It is a super-2 number, since 2×21076270² = 888418314225800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21076271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1053804 + ... + 1053823.

It is an arithmetic number, because the mean of its divisors is an integer number (4742163).

Almost surely, 2^21076270 is an apocalyptic number.

21076270 is a deficient number, since it is larger than the sum of its proper divisors (16861034).

21076270 is a wasteful number, since it uses less digits than its factorization.

21076270 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2107634.

The product of its (nonzero) digits is 1176, while the sum is 25.

The square root of 21076270 is about 4590.8898919491. The cubic root of 21076270 is about 276.2260190890.

The spelling of 21076270 in words is "twenty-one million, seventy-six thousand, two hundred seventy".