21060423 has 12 divisors (see below), whose sum is σ = 30624048. Its totient is φ = 13946400.

The previous prime is 21060421. The next prime is 21060449. The reversal of 21060423 is 32406012.

It is a happy number.

It is not a de Polignac number, because 21060423 - 2¹ = 21060421 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21060396 and 21060405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21060421) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6390 + ... + 9107.

It is an arithmetic number, because the mean of its divisors is an integer number (2552004).

Almost surely, 2^21060423 is an apocalyptic number.

21060423 is a deficient number, since it is larger than the sum of its proper divisors (9563625).

21060423 is a wasteful number, since it uses less digits than its factorization.

21060423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15654 (or 15651 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 21060423 is about 4589.1636492938. The cubic root of 21060423 is about 276.1567713636.

Adding to 21060423 its reverse (32406012), we get a palindrome (53466435).

The spelling of 21060423 in words is "twenty-one million, sixty thousand, four hundred twenty-three".