20061145 has 12 divisors (see below), whose sum is σ = 26068716. Its totient is φ = 14813760.

The previous prime is 20061137. The next prime is 20061161. The reversal of 20061145 is 54116002.

It can be written as a sum of positive squares in 6 ways, for example, as 205209 + 19855936 = 453^2 + 4456^2 .

It is not a de Polignac number, because 20061145 - 2³ = 20061137 is a prime.

It is a super-2 number, since 2×20061145² = 804899077422050, which contains 22 as substring.

It is a Duffinian number.

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 11 ways as a sum of consecutive naturals, for example, 11026 + ... + 12715.

It is an arithmetic number, because the mean of its divisors is an integer number (2172393).

Almost surely, 2^20061145 is an apocalyptic number.

It is an amenable number.

20061145 is a deficient number, since it is larger than the sum of its proper divisors (6007571).

20061145 is a wasteful number, since it uses less digits than its factorization.

20061145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23772 (or 23759 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 20061145 is about 4478.9669567881. The cubic root of 20061145 is about 271.7181020120.

Adding to 20061145 its reverse (54116002), we get a palindrome (74177147).

The spelling of 20061145 in words is "twenty million, sixty-one thousand, one hundred forty-five".