20620682 has 8 divisors (see below), whose sum is σ = 31997700. Its totient is φ = 9954784.

The previous prime is 20620679. The next prime is 20620687. The reversal of 20620682 is 28602602.

It is a Cunningham number, because it is equal to 4541²+1.

It can be written as a sum of positive squares in 2 ways, for example, as 20620681 + 1 = 4541^2 + 1^2 .

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

It is a super-2 number, since 2×20620682² = 850425052290248, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20620687) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 177707 + ... + 177822.

Almost surely, 2^20620682 is an apocalyptic number.

20620682 is a deficient number, since it is larger than the sum of its proper divisors (11377018).

20620682 is a wasteful number, since it uses less digits than its factorization.

20620682 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 355560.

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 20620682 is about 4541.0001101079. Note that the first 3 decimals coincide. The cubic root of 20620682 is about 274.2211881892.

The spelling of 20620682 in words is "twenty million, six hundred twenty thousand, six hundred eighty-two".