21463285 has 8 divisors (see below), whose sum is σ = 25780896. Its totient is φ = 17154000.

The previous prime is 21463283. The next prime is 21463289. The reversal of 21463285 is 58236412.

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

It is not a de Polignac number, because 21463285 - 2¹ = 21463283 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 (21463283) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8410 + ... + 10660.

It is an arithmetic number, because the mean of its divisors is an integer number (3222612).

Almost surely, 2^21463285 is an apocalyptic number.

It is an amenable number.

21463285 is a deficient number, since it is larger than the sum of its proper divisors (4317611).

21463285 is a wasteful number, since it uses less digits than its factorization.

21463285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4163.

The product of its digits is 11520, while the sum is 31.

The square root of 21463285 is about 4632.8484758300. The cubic root of 21463285 is about 277.9065167106.

Adding to 21463285 its reverse (58236412), we get a palindrome (79699697).

The spelling of 21463285 in words is "twenty-one million, four hundred sixty-three thousand, two hundred eighty-five".