21713035 has 16 divisors (see below), whose sum is σ = 27316800. Its totient is φ = 16536960.

The previous prime is 21713033. The next prime is 21713039. The reversal of 21713035 is 53031712.

It is not a de Polignac number, because 21713035 - 2¹ = 21713033 is a prime.

It is a super-2 number, since 2×21713035² = 942911777822450, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21712997 and 21713015.

It is not an unprimeable number, because it can be changed into a prime (21713033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39865 + ... + 40405.

It is an arithmetic number, because the mean of its divisors is an integer number (1707300).

Almost surely, 2^21713035 is an apocalyptic number.

21713035 is a deficient number, since it is larger than the sum of its proper divisors (5603765).

21713035 is a wasteful number, since it uses less digits than its factorization.

21713035 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 918.

The product of its (nonzero) digits is 630, while the sum is 22.

The square root of 21713035 is about 4659.7247772803. The cubic root of 21713035 is about 278.9802832039.

Adding to 21713035 its reverse (53031712), we get a palindrome (74744747).

The spelling of 21713035 in words is "twenty-one million, seven hundred thirteen thousand, thirty-five".