21061703 has 8 divisors (see below), whose sum is σ = 22809696. Its totient is φ = 19332000.

The previous prime is 21061693. The next prime is 21061717. The reversal of 21061703 is 30716012.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21061703 - 2⁶ = 21061639 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21061783) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2123 + ... + 6828.

It is an arithmetic number, because the mean of its divisors is an integer number (2851212).

Almost surely, 2^21061703 is an apocalyptic number.

21061703 is a deficient number, since it is larger than the sum of its proper divisors (1747993).

21061703 is a wasteful number, since it uses less digits than its factorization.

21061703 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9145.

The product of its (nonzero) digits is 252, while the sum is 20.

The square root of 21061703 is about 4589.3031061371. The cubic root of 21061703 is about 276.1623659569.

Adding to 21061703 its reverse (30716012), we get a palindrome (51777715).

The spelling of 21061703 in words is "twenty-one million, sixty-one thousand, seven hundred three".