21083701 has 4 divisors (see below), whose sum is σ = 21096172. Its totient is φ = 21071232.

The previous prime is 21083669. The next prime is 21083719. The reversal of 21083701 is 10738012.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 19580625 + 1503076 = 4425^2 + 1226^2 .

It is a cyclic number.

It is not a de Polignac number, because 21083701 - 2⁵ = 21083669 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 (21023701) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3210 + ... + 7243.

It is an arithmetic number, because the mean of its divisors is an integer number (5274043).

Almost surely, 2^21083701 is an apocalyptic number.

It is an amenable number.

21083701 is a deficient number, since it is larger than the sum of its proper divisors (12471).

21083701 is a wasteful number, since it uses less digits than its factorization.

21083701 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12470.

The product of its (nonzero) digits is 336, while the sum is 22.

The square root of 21083701 is about 4591.6991408410. The cubic root of 21083701 is about 276.2584788864.

The spelling of 21083701 in words is "twenty-one million, eighty-three thousand, seven hundred one".