21060470 has 32 divisors (see below), whose sum is σ = 40110336. Its totient is φ = 7948800.

The previous prime is 21060469. The next prime is 21060491. The reversal of 21060470 is 7406012.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 11882 + ... + 13538.

It is an arithmetic number, because the mean of its divisors is an integer number (1253448).

Almost surely, 2^21060470 is an apocalyptic number.

21060470 is a deficient number, since it is larger than the sum of its proper divisors (19049866).

21060470 is a wasteful number, since it uses less digits than its factorization.

21060470 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1736.

The product of its (nonzero) digits is 336, while the sum is 20.

The square root of 21060470 is about 4589.1687700498. The cubic root of 21060470 is about 276.1569767941.

Adding to 21060470 its reverse (7406012), we get a palindrome (28466482).

The spelling of 21060470 in words is "twenty-one million, sixty thousand, four hundred seventy".