40204013 has 4 divisors (see below), whose sum is σ = 40253340. Its totient is φ = 40154688.

The previous prime is 40203991. The next prime is 40204027. The reversal of 40204013 is 31040204.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 14122564 + 26081449 = 3758^2 + 5107^2 .

It is a cyclic number.

It is not a de Polignac number, because 40204013 - 2⁶ = 40203949 is a prime.

It is a super-2 number, since 2×40204013² = 3232725322608338, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40204033) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23420 + ... + 25077.

It is an arithmetic number, because the mean of its divisors is an integer number (10063335).

Almost surely, 2^40204013 is an apocalyptic number.

It is an amenable number.

40204013 is a deficient number, since it is larger than the sum of its proper divisors (49327).

40204013 is an equidigital number, since it uses as much as digits as its factorization.

40204013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49326.

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 40204013 is about 6340.6634510909. The cubic root of 40204013 is about 342.5756325060.

Adding to 40204013 its reverse (31040204), we get a palindrome (71244217).

The spelling of 40204013 in words is "forty million, two hundred four thousand, thirteen".