21301026 has 16 divisors (see below), whose sum is σ = 42781728. Its totient is φ = 7070400.

The previous prime is 21300997. The next prime is 21301031. The reversal of 21301026 is 62010312.

It is a junction number, because it is equal to n+sod(n) for n = 21300996 and 21301014.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5920 + ... + 8811.

It is an arithmetic number, because the mean of its divisors is an integer number (2673858).

Almost surely, 2^21301026 is an apocalyptic number.

21301026 is an abundant number, since it is smaller than the sum of its proper divisors (21480702).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21301026 is a wasteful number, since it uses less digits than its factorization.

21301026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14977.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 21301026 is about 4615.3034569787. The cubic root of 21301026 is about 277.2044349201.

Adding to 21301026 its reverse (62010312), we get a palindrome (83311338).

The spelling of 21301026 in words is "twenty-one million, three hundred one thousand, twenty-six".