20461913 has 2 divisors, whose sum is σ = 20461914. Its totient is φ = 20461912.

The previous prime is 20461853. The next prime is 20461933. The reversal of 20461913 is 31916402.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17530969 + 2930944 = 4187^2 + 1712^2 .

It is a cyclic number.

It is not a de Polignac number, because 20461913 - 2¹⁸ = 20199769 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20461933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10230956 + 10230957.

It is an arithmetic number, because the mean of its divisors is an integer number (10230957).

Almost surely, 2^20461913 is an apocalyptic number.

It is an amenable number.

20461913 is a deficient number, since it is larger than the sum of its proper divisors (1).

20461913 is an equidigital number, since it uses as much as digits as its factorization.

20461913 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 20461913 is about 4523.4846081312. The cubic root of 20461913 is about 273.5155852072.

The spelling of 20461913 in words is "twenty million, four hundred sixty-one thousand, nine hundred thirteen".