20620061 has 16 divisors (see below), whose sum is σ = 25826688. Its totient is φ = 15993600.

The previous prime is 20620051. The next prime is 20620079. The reversal of 20620061 is 16002602.

20620061 = T₆₉₃ + T₆₉₄ + ... + T₇₆₉.

It is a de Polignac number, because none of the positive numbers 2^k-20620061 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20620051) 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 15 ways as a sum of consecutive naturals, for example, 21161 + ... + 22113.

It is an arithmetic number, because the mean of its divisors is an integer number (1614168).

Almost surely, 2^20620061 is an apocalyptic number.

It is an amenable number.

20620061 is a deficient number, since it is larger than the sum of its proper divisors (5206627).

20620061 is a wasteful number, since it uses less digits than its factorization.

20620061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1252.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 20620061 is about 4540.9317325853. The cubic root of 20620061 is about 274.2184354017.

Adding to 20620061 its reverse (16002602), we get a palindrome (36622663).

The spelling of 20620061 in words is "twenty million, six hundred twenty thousand, sixty-one".