40218823 has 2 divisors, whose sum is σ = 40218824. Its totient is φ = 40218822.

The previous prime is 40218809. The next prime is 40218859. The reversal of 40218823 is 32881204.

40218823 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40218823 - 2⁵ = 40218791 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 40218791 and 40218800.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40218883) 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, 20109411 + 20109412.

It is an arithmetic number, because the mean of its divisors is an integer number (20109412).

Almost surely, 2^40218823 is an apocalyptic number.

40218823 is a deficient number, since it is larger than the sum of its proper divisors (1).

40218823 is an equidigital number, since it uses as much as digits as its factorization.

40218823 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3072, while the sum is 28.

The square root of 40218823 is about 6341.8312024210. The cubic root of 40218823 is about 342.6176923394.

It can be divided in two parts, 40218 and 823, that added together give a triangular number (41041 = T₂₈₆).

The spelling of 40218823 in words is "forty million, two hundred eighteen thousand, eight hundred twenty-three".