20130961 has 2 divisors, whose sum is σ = 20130962. Its totient is φ = 20130960.

The previous prime is 20130949. The next prime is 20130983. The reversal of 20130961 is 16903102.

It is an a-pointer prime, because the next prime (20130983) can be obtained adding 20130961 to its sum of digits (22).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18490000 + 1640961 = 4300^2 + 1281^2 .

It is a cyclic number.

It is not a de Polignac number, because 20130961 - 2⁷ = 20130833 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20130931) 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 as a sum of consecutive naturals, namely, 10065480 + 10065481.

It is an arithmetic number, because the mean of its divisors is an integer number (10065481).

Almost surely, 2^20130961 is an apocalyptic number.

It is an amenable number.

20130961 is a deficient number, since it is larger than the sum of its proper divisors (1).

20130961 is an equidigital number, since it uses as much as digits as its factorization.

20130961 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 324, while the sum is 22.

The square root of 20130961 is about 4486.7539491263. The cubic root of 20130961 is about 272.0329445751.

The spelling of 20130961 in words is "twenty million, one hundred thirty thousand, nine hundred sixty-one".