38181823 has 2 divisors, whose sum is σ = 38181824. Its totient is φ = 38181822.

The previous prime is 38181797. The next prime is 38181827. The reversal of 38181823 is 32818183.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-38181823 is a prime.

It is a plaindrome in base 16.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38181827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19090911 + 19090912.

It is an arithmetic number, because the mean of its divisors is an integer number (19090912).

Almost surely, 2^38181823 is an apocalyptic number.

38181823 is a deficient number, since it is larger than the sum of its proper divisors (1).

38181823 is an equidigital number, since it uses as much as digits as its factorization.

38181823 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9216, while the sum is 34.

The square root of 38181823 is about 6179.1441964078. The cubic root of 38181823 is about 336.7329021506.

The spelling of 38181823 in words is "thirty-eight million, one hundred eighty-one thousand, eight hundred twenty-three".