20696210 has 16 divisors (see below), whose sum is σ = 37402776. Its totient is φ = 8245248.

The previous prime is 20696177. The next prime is 20696219. The reversal of 20696210 is 1269602.

It can be written as a sum of positive squares in 4 ways, for example, as 20693401 + 2809 = 4549^2 + 53^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20696210.

It is not an unprimeable number, because it can be changed into a prime (20696219) 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, 1457 + ... + 6596.

Almost surely, 2^20696210 is an apocalyptic number.

20696210 is a deficient number, since it is larger than the sum of its proper divisors (16706566).

20696210 is a wasteful number, since it uses less digits than its factorization.

20696210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8317.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 20696210 is about 4549.3087386987. The cubic root of 20696210 is about 274.5555796915. Note that the first 4 decimals are identical.

The spelling of 20696210 in words is "twenty million, six hundred ninety-six thousand, two hundred ten".