40020371 has 2 divisors, whose sum is σ = 40020372. Its totient is φ = 40020370.

The previous prime is 40020317. The next prime is 40020389. The reversal of 40020371 is 17302004.

It is a happy number.

Together with previous prime (40020317) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40020371 - 2⁶ = 40020307 is a prime.

It is not a weakly prime, because it can be changed into another prime (40020271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20010185 + 20010186.

It is an arithmetic number, because the mean of its divisors is an integer number (20010186).

Almost surely, 2^40020371 is an apocalyptic number.

40020371 is a deficient number, since it is larger than the sum of its proper divisors (1).

40020371 is an equidigital number, since it uses as much as digits as its factorization.

40020371 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 168, while the sum is 17.

The square root of 40020371 is about 6326.1655843014. The cubic root of 40020371 is about 342.0532360159.

Adding to 40020371 its reverse (17302004), we get a palindrome (57322375).

The spelling of 40020371 in words is "forty million, twenty thousand, three hundred seventy-one".