20210061 has 4 divisors (see below), whose sum is σ = 26946752. Its totient is φ = 13473372.

The previous prime is 20210039. The next prime is 20210063. The reversal of 20210061 is 16001202.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 20210061 - 2⁷ = 20209933 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 (20210063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3368341 + ... + 3368346.

It is an arithmetic number, because the mean of its divisors is an integer number (6736688).

Almost surely, 2^20210061 is an apocalyptic number.

It is an amenable number.

20210061 is a deficient number, since it is larger than the sum of its proper divisors (6736691).

20210061 is an equidigital number, since it uses as much as digits as its factorization.

20210061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6736690.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 20210061 is about 4495.5601430745. The cubic root of 20210061 is about 272.3887759763.

Adding to 20210061 its reverse (16001202), we get a palindrome (36211263).

The spelling of 20210061 in words is "twenty million, two hundred ten thousand, sixty-one".