20213170 has 16 divisors (see below), whose sum is σ = 38524248. Its totient is φ = 7609600.

The previous prime is 20213107. The next prime is 20213183. The reversal of 20213170 is 7131202.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 17480761 + 2732409 = 4181^2 + 1653^2 .

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 7 ways as a sum of consecutive naturals, for example, 59281 + ... + 59620.

Almost surely, 2^20213170 is an apocalyptic number.

20213170 is a deficient number, since it is larger than the sum of its proper divisors (18311078).

20213170 is a wasteful number, since it uses less digits than its factorization.

20213170 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118925.

The product of its (nonzero) digits is 84, while the sum is 16.

The square root of 20213170 is about 4495.9059153857. The cubic root of 20213170 is about 272.4027428363.

Adding to 20213170 its reverse (7131202), we get a palindrome (27344372).

The spelling of 20213170 in words is "twenty million, two hundred thirteen thousand, one hundred seventy".