21276026 has 8 divisors (see below), whose sum is σ = 31942164. Its totient is φ = 10628640.

The previous prime is 21276023. The next prime is 21276071. The reversal of 21276026 is 62067212.

It can be written as a sum of positive squares in 2 ways, for example, as 18054001 + 3222025 = 4249^2 + 1795^2 .

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 = 21275986 and 21276004.

It is not an unprimeable number, because it can be changed into a prime (21276023) 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, 1385 + ... + 6668.

Almost surely, 2^21276026 is an apocalyptic number.

21276026 is a deficient number, since it is larger than the sum of its proper divisors (10666138).

21276026 is a wasteful number, since it uses less digits than its factorization.

21276026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9376.

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 21276026 is about 4612.5942808793. The cubic root of 21276026 is about 277.0959452504.

The spelling of 21276026 in words is "twenty-one million, two hundred seventy-six thousand, twenty-six".