21470485 has 8 divisors (see below), whose sum is σ = 26149536. Its totient is φ = 16919760.

The previous prime is 21470483. The next prime is 21470489. The reversal of 21470485 is 58407412.

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

It is not a de Polignac number, because 21470485 - 2¹ = 21470483 is a prime.

It is a super-2 number, since 2×21470485² = 921963452270450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21470483) 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, 31711 + ... + 32380.

It is an arithmetic number, because the mean of its divisors is an integer number (3268692).

Almost surely, 2^21470485 is an apocalyptic number.

It is an amenable number.

21470485 is a deficient number, since it is larger than the sum of its proper divisors (4679051).

21470485 is an equidigital number, since it uses as much as digits as its factorization.

21470485 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64163.

The product of its (nonzero) digits is 8960, while the sum is 31.

The square root of 21470485 is about 4633.6254704065. The cubic root of 21470485 is about 277.9375884256.

Adding to 21470485 its reverse (58407412), we get a palindrome (79877897).

The spelling of 21470485 in words is "twenty-one million, four hundred seventy thousand, four hundred eighty-five".