21060413 has 8 divisors (see below), whose sum is σ = 23166336. Its totient is φ = 19144620.

The previous prime is 21060401. The next prime is 21060421. The reversal of 21060413 is 31406012.

It is not a de Polignac number, because 21060413 - 2²⁴ = 4283197 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21060391 and 21060400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21060313) 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 7 ways as a sum of consecutive naturals, for example, 6581 + ... + 9242.

It is an arithmetic number, because the mean of its divisors is an integer number (2895792).

Almost surely, 2^21060413 is an apocalyptic number.

It is an amenable number.

21060413 is a deficient number, since it is larger than the sum of its proper divisors (2105923).

21060413 is an equidigital number, since it uses as much as digits as its factorization.

21060413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15856 (or 15834 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 21060413 is about 4589.1625597706. The cubic root of 21060413 is about 276.1567276549.

Adding to 21060413 its reverse (31406012), we get a palindrome (52466425).

The spelling of 21060413 in words is "twenty-one million, sixty thousand, four hundred thirteen".