20145061 has 8 divisors (see below), whose sum is σ = 20520000. Its totient is φ = 19773600.

The previous prime is 20145031. The next prime is 20145077. The reversal of 20145061 is 16054102.

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

It is a cyclic number.

It is not a de Polignac number, because 20145061 - 2⁵ = 20145029 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20145031) 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, 12690 + ... + 14188.

It is an arithmetic number, because the mean of its divisors is an integer number (2565000).

Almost surely, 2^20145061 is an apocalyptic number.

It is an amenable number.

20145061 is a deficient number, since it is larger than the sum of its proper divisors (374939).

20145061 is a wasteful number, since it uses less digits than its factorization.

20145061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1739.

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

The square root of 20145061 is about 4488.3249659533. The cubic root of 20145061 is about 272.0964416158.

Adding to 20145061 its reverse (16054102), we get a palindrome (36199163).

The spelling of 20145061 in words is "twenty million, one hundred forty-five thousand, sixty-one".