20381741 has 2 divisors, whose sum is σ = 20381742. Its totient is φ = 20381740.

The previous prime is 20381731. The next prime is 20381761. The reversal of 20381741 is 14718302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14280841 + 6100900 = 3779^2 + 2470^2 .

It is a cyclic number.

It is not a de Polignac number, because 20381741 - 2⁶ = 20381677 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 20381741.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20381701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10190870 + 10190871.

It is an arithmetic number, because the mean of its divisors is an integer number (10190871).

Almost surely, 2^20381741 is an apocalyptic number.

It is an amenable number.

20381741 is a deficient number, since it is larger than the sum of its proper divisors (1).

20381741 is an equidigital number, since it uses as much as digits as its factorization.

20381741 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 20381741 is about 4514.6141584858. The cubic root of 20381741 is about 273.1578963775.

The spelling of 20381741 in words is "twenty million, three hundred eighty-one thousand, seven hundred forty-one".