40036021 has 8 divisors (see below), whose sum is σ = 42249600. Its totient is φ = 37833120.

The previous prime is 40036019. The next prime is 40036081. The reversal of 40036021 is 12063004.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 40036021 - 2¹ = 40036019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40035986 and 40036004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40036081) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5745 + ... + 10633.

It is an arithmetic number, because the mean of its divisors is an integer number (5281200).

Almost surely, 2^40036021 is an apocalyptic number.

It is an amenable number.

40036021 is a deficient number, since it is larger than the sum of its proper divisors (2213579).

40036021 is a wasteful number, since it uses less digits than its factorization.

40036021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5339.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 40036021 is about 6327.4023896067. The cubic root of 40036021 is about 342.0978169412.

Adding to 40036021 its reverse (12063004), we get a palindrome (52099025).

The spelling of 40036021 in words is "forty million, thirty-six thousand, twenty-one".