40020037 has 2 divisors, whose sum is σ = 40020038. Its totient is φ = 40020036.

The previous prime is 40020017. The next prime is 40020041. The reversal of 40020037 is 73002004.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27867841 + 12152196 = 5279^2 + 3486^2 .

It is a cyclic number.

It is not a de Polignac number, because 40020037 - 2²³ = 31631429 is a prime.

It is a super-2 number, since 2×40020037² = 3203206722962738, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 40020037.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40020017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20010018 + 20010019.

It is an arithmetic number, because the mean of its divisors is an integer number (20010019).

Almost surely, 2^40020037 is an apocalyptic number.

It is an amenable number.

40020037 is a deficient number, since it is larger than the sum of its proper divisors (1).

40020037 is an equidigital number, since it uses as much as digits as its factorization.

40020037 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 16.

The square root of 40020037 is about 6326.1391859490. The cubic root of 40020037 is about 342.0522844497.

The spelling of 40020037 in words is "forty million, twenty thousand, thirty-seven".