21132026 has 12 divisors (see below), whose sum is σ = 32123322. Its totient is φ = 10426104.

The previous prime is 21132011. The next prime is 21132061. The reversal of 21132026 is 62023112.

It can be written as a sum of positive squares in only one way, i.e., 18879025 + 2253001 = 4345^2 + 1501^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21131995 and 21132013.

It is an unprimeable number.

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, 11636 + ... + 13328.

Almost surely, 2^21132026 is an apocalyptic number.

21132026 is a deficient number, since it is larger than the sum of its proper divisors (10991296).

21132026 is an equidigital number, since it uses as much as digits as its factorization.

21132026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1853 (or 1774 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 21132026 is about 4596.9583422085. The cubic root of 21132026 is about 276.4693843653.

Adding to 21132026 its reverse (62023112), we get a palindrome (83155138).

The spelling of 21132026 in words is "twenty-one million, one hundred thirty-two thousand, twenty-six".