20105061 has 8 divisors (see below), whose sum is σ = 26835360. Its totient is φ = 13389072.

The previous prime is 20105053. The next prime is 20105087. The reversal of 20105061 is 16050102.

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

It is not a de Polignac number, because 20105061 - 2³ = 20105053 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20105061.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20105861) 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, 306 + ... + 6348.

It is an arithmetic number, because the mean of its divisors is an integer number (3354420).

Almost surely, 2^20105061 is an apocalyptic number.

It is an amenable number.

20105061 is a deficient number, since it is larger than the sum of its proper divisors (6730299).

20105061 is a wasteful number, since it uses less digits than its factorization.

20105061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7155.

The product of its (nonzero) digits is 60, while the sum is 15.

The square root of 20105061 is about 4483.8667464589. The cubic root of 20105061 is about 271.9162308720.

Adding to 20105061 its reverse (16050102), we get a palindrome (36155163).

The spelling of 20105061 in words is "twenty million, one hundred five thousand, sixty-one".