2000402381 has 2 divisors, whose sum is σ = 2000402382. Its totient is φ = 2000402380.

The previous prime is 2000402377. The next prime is 2000402413. The reversal of 2000402381 is 1832040002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1982475625 + 17926756 = 44525^2 + 4234^2 .

It is a cyclic number.

It is not a de Polignac number, because 2000402381 - 2² = 2000402377 is a prime.

It is a super-2 number, since 2×2000402381² = 8003219371820938322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2000402581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1000201190 + 1000201191.

It is an arithmetic number, because the mean of its divisors is an integer number (1000201191).

Almost surely, 2^2000402381 is an apocalyptic number.

It is an amenable number.

2000402381 is a deficient number, since it is larger than the sum of its proper divisors (1).

2000402381 is an equidigital number, since it uses as much as digits as its factorization.

2000402381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 2000402381 is about 44725.8580800861. The cubic root of 2000402381 is about 1260.0055389443.

Adding to 2000402381 its reverse (1832040002), we get a palindrome (3832442383).

The spelling of 2000402381 in words is "two billion, four hundred two thousand, three hundred eighty-one".