40505021433 has 96 divisors (see below), whose sum is σ = 65580278400. Its totient is φ = 24928114176.

The previous prime is 40505021413. The next prime is 40505021441. The reversal of 40505021433 is 33412050504.

It is not a de Polignac number, because 40505021433 - 2⁹ = 40505020921 is a prime.

It is a super-2 number, since 2×40505021433² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 40505021397 and 40505021406.

It is not an unprimeable number, because it can be changed into a prime (40505021413) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 15382285 + ... + 15384917.

It is an arithmetic number, because the mean of its divisors is an integer number (683127900).

Almost surely, 2^40505021433 is an apocalyptic number.

It is an amenable number.

40505021433 is a deficient number, since it is larger than the sum of its proper divisors (25075256967).

40505021433 is a wasteful number, since it uses less digits than its factorization.

40505021433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2773 (or 2761 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 27.

Adding to 40505021433 its reverse (33412050504), we get a palindrome (73917071937).

The spelling of 40505021433 in words is "forty billion, five hundred five million, twenty-one thousand, four hundred thirty-three".