21060411 has 8 divisors (see below), whose sum is σ = 28733760. Its totient is φ = 13713672.

The previous prime is 21060401. The next prime is 21060421. The reversal of 21060411 is 11406012.

It is an interprime number because it is at equal distance from previous prime (21060401) and next prime (21060421).

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

It is not a de Polignac number, because 21060411 - 2¹⁰ = 21059387 is a prime.

It is a super-2 number, since 2×21060411² = 887081822977842, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21060401) 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, 81501 + ... + 81758.

It is an arithmetic number, because the mean of its divisors is an integer number (3591720).

Almost surely, 2^21060411 is an apocalyptic number.

21060411 is a deficient number, since it is larger than the sum of its proper divisors (7673349).

21060411 is a wasteful number, since it uses less digits than its factorization.

21060411 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163305.

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 21060411 is about 4589.1623418659. The cubic root of 21060411 is about 276.1567189132.

Adding to 21060411 its reverse (11406012), we get a palindrome (32466423).

The spelling of 21060411 in words is "twenty-one million, sixty thousand, four hundred eleven".