18882013 has 2 divisors, whose sum is σ = 18882014. Its totient is φ = 18882012.

The previous prime is 18881999. The next prime is 18882023. The reversal of 18882013 is 31028881.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14953689 + 3928324 = 3867^2 + 1982^2 .

It is a cyclic number.

It is not a de Polignac number, because 18882013 - 2⁹ = 18881501 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18882023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9441006 + 9441007.

It is an arithmetic number, because the mean of its divisors is an integer number (9441007).

Almost surely, 2^18882013 is an apocalyptic number.

It is an amenable number.

18882013 is a deficient number, since it is larger than the sum of its proper divisors (1).

18882013 is an equidigital number, since it uses as much as digits as its factorization.

18882013 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 31.

The square root of 18882013 is about 4345.3438298942. The cubic root of 18882013 is about 266.2866724891.

The spelling of 18882013 in words is "eighteen million, eight hundred eighty-two thousand, thirteen".