21359026 has 16 divisors (see below), whose sum is σ = 34771968. Its totient is φ = 9781200.

The previous prime is 21359017. The next prime is 21359047. The reversal of 21359026 is 62095312.

It is a junction number, because it is equal to n+sod(n) for n = 21358985 and 21359003.

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 7 ways as a sum of consecutive naturals, for example, 271 + ... + 6541.

It is an arithmetic number, because the mean of its divisors is an integer number (2173248).

Almost surely, 2^21359026 is an apocalyptic number.

21359026 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

21359026 is a deficient number, since it is larger than the sum of its proper divisors (13412942).

21359026 is a wasteful number, since it uses less digits than its factorization.

21359026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6417.

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 21359026 is about 4621.5826293598. The cubic root of 21359026 is about 277.4558044488.

The spelling of 21359026 in words is "twenty-one million, three hundred fifty-nine thousand, twenty-six".