20035381 has 2 divisors, whose sum is σ = 20035382. Its totient is φ = 20035380.

The previous prime is 20035363. The next prime is 20035391. The reversal of 20035381 is 18353002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19847025 + 188356 = 4455^2 + 434^2 .

It is a cyclic number.

It is not a de Polignac number, because 20035381 - 2⁹ = 20034869 is a prime.

It is a super-2 number, since 2×20035381² = 802832983630322, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20035391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10017690 + 10017691.

It is an arithmetic number, because the mean of its divisors is an integer number (10017691).

Almost surely, 2^20035381 is an apocalyptic number.

It is an amenable number.

20035381 is a deficient number, since it is larger than the sum of its proper divisors (1).

20035381 is an equidigital number, since it uses as much as digits as its factorization.

20035381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 20035381 is about 4476.0899231360. The cubic root of 20035381 is about 271.6017320475.

Adding to 20035381 its reverse (18353002), we get a palindrome (38388383).

The spelling of 20035381 in words is "twenty million, thirty-five thousand, three hundred eighty-one".