20807741 has 2 divisors, whose sum is σ = 20807742. Its totient is φ = 20807740.

The previous prime is 20807737. The next prime is 20807749. The reversal of 20807741 is 14770802.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10432900 + 10374841 = 3230^2 + 3221^2 .

It is a cyclic number.

It is not a de Polignac number, because 20807741 - 2² = 20807737 is a prime.

It is equal to p_1318583 and since 20807741 and 1318583 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20807749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10403870 + 10403871.

It is an arithmetic number, because the mean of its divisors is an integer number (10403871).

Almost surely, 2^20807741 is an apocalyptic number.

It is an amenable number.

20807741 is a deficient number, since it is larger than the sum of its proper divisors (1).

20807741 is an equidigital number, since it uses as much as digits as its factorization.

20807741 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3136, while the sum is 29.

The square root of 20807741 is about 4561.5502847168. The cubic root of 20807741 is about 275.0478858760.

The spelling of 20807741 in words is "twenty million, eight hundred seven thousand, seven hundred forty-one".