40013362421 has 4 divisors (see below), whose sum is σ = 40669319244. Its totient is φ = 39357405600.

The previous prime is 40013362357. The next prime is 40013362447. The reversal of 40013362421 is 12426331004.

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 15211522225 + 24801840196 = 123335^2 + 157486^2 .

It is a cyclic number.

It is not a de Polignac number, because 40013362421 - 2⁶ = 40013362357 is a prime.

It is a super-3 number, since 3×40013362421³ (a number of 33 digits) contains 333 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 (40013362471) 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, 327978320 + ... + 327978441.

It is an arithmetic number, because the mean of its divisors is an integer number (10167329811).

Almost surely, 2^40013362421 is an apocalyptic number.

It is an amenable number.

40013362421 is a deficient number, since it is larger than the sum of its proper divisors (655956823).

40013362421 is an equidigital number, since it uses as much as digits as its factorization.

40013362421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 655956822.

The product of its (nonzero) digits is 3456, while the sum is 26.

Adding to 40013362421 its reverse (12426331004), we get a palindrome (52439693425).

The spelling of 40013362421 in words is "forty billion, thirteen million, three hundred sixty-two thousand, four hundred twenty-one".