11738021 has 2 divisors, whose sum is σ = 11738022. Its totient is φ = 11738020.

The previous prime is 11737997. The next prime is 11738033. The reversal of 11738021 is 12083711.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11730625 + 7396 = 3425^2 + 86^2 .

It is a cyclic number.

It is not a de Polignac number, because 11738021 - 2¹⁰ = 11736997 is a prime.

It is a super-2 number, since 2×11738021² = 275562273992882, 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 (11738621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5869010 + 5869011.

It is an arithmetic number, because the mean of its divisors is an integer number (5869011).

Almost surely, 2^11738021 is an apocalyptic number.

It is an amenable number.

11738021 is a deficient number, since it is larger than the sum of its proper divisors (1).

11738021 is an equidigital number, since it uses as much as digits as its factorization.

11738021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 336, while the sum is 23.

The square root of 11738021 is about 3426.0795378975. The cubic root of 11738021 is about 227.2645134050.

The spelling of 11738021 in words is "eleven million, seven hundred thirty-eight thousand, twenty-one".