20216470 has 8 divisors (see below), whose sum is σ = 36389664. Its totient is φ = 8086584.

The previous prime is 20216447. The next prime is 20216477. The reversal of 20216470 is 7461202.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20216477) 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 3 ways as a sum of consecutive naturals, for example, 1010814 + ... + 1010833.

It is an arithmetic number, because the mean of its divisors is an integer number (4548708).

Almost surely, 2^20216470 is an apocalyptic number.

20216470 is a deficient number, since it is larger than the sum of its proper divisors (16173194).

20216470 is a wasteful number, since it uses less digits than its factorization.

20216470 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2021654.

The product of its (nonzero) digits is 672, while the sum is 22.

The square root of 20216470 is about 4496.2729009703. The cubic root of 20216470 is about 272.4175661774.

Adding to 20216470 its reverse (7461202), we get a palindrome (27677672).

The spelling of 20216470 in words is "twenty million, two hundred sixteen thousand, four hundred seventy".