21338703 has 12 divisors (see below), whose sum is σ = 31245760. Its totient is φ = 14030496.

The previous prime is 21338683. The next prime is 21338717. The reversal of 21338703 is 30783312.

It is not a de Polignac number, because 21338703 - 2⁵ = 21338671 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21338783) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 15583 + ... + 16896.

Almost surely, 2^21338703 is an apocalyptic number.

21338703 is a deficient number, since it is larger than the sum of its proper divisors (9907057).

21338703 is a wasteful number, since it uses less digits than its factorization.

21338703 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32558 (or 32555 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 27.

The square root of 21338703 is about 4619.3834004118. The cubic root of 21338703 is about 277.3677772815.

It can be divided in two parts, 21 and 338703, that added together give a square (338724 = 582²).

The spelling of 21338703 in words is "twenty-one million, three hundred thirty-eight thousand, seven hundred three".