418382021 has 2 divisors, whose sum is σ = 418382022. Its totient is φ = 418382020.

The previous prime is 418382011. The next prime is 418382057. The reversal of 418382021 is 120283814.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 356680996 + 61701025 = 18886^2 + 7855^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-418382021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (418382011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 209191010 + 209191011.

It is an arithmetic number, because the mean of its divisors is an integer number (209191011).

Almost surely, 2^418382021 is an apocalyptic number.

It is an amenable number.

418382021 is a deficient number, since it is larger than the sum of its proper divisors (1).

418382021 is an equidigital number, since it uses as much as digits as its factorization.

418382021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3072, while the sum is 29.

The square root of 418382021 is about 20454.3887955617. The cubic root of 418382021 is about 747.9243473727.

The spelling of 418382021 in words is "four hundred eighteen million, three hundred eighty-two thousand, twenty-one".