31420040418 has 48 divisors (see below), whose sum is σ = 74137223160. Its totient is φ = 9559072512.

The previous prime is 31420040417. The next prime is 31420040419. The reversal of 31420040418 is 81404002413.

31420040418 is a `hidden beast` number, since 3 + 1 + 4 + 200 + 40 + 418 = 666.

It is an interprime number because it is at equal distance from previous prime (31420040417) and next prime (31420040419).

It can be written as a sum of positive squares in 4 ways, for example, as 7428198969 + 23991841449 = 86187^2 + 154893^2 .

It is a super-2 number, since 2×31420040418² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 31420040391 and 31420040400.

It is not an unprimeable number, because it can be changed into a prime (31420040413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 733521 + ... + 775172.

Almost surely, 2^31420040418 is an apocalyptic number.

31420040418 is an abundant number, since it is smaller than the sum of its proper divisors (42717182742).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31420040418 is a wasteful number, since it uses less digits than its factorization.

31420040418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1508803 (or 1508800 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 27.

The spelling of 31420040418 in words is "thirty-one billion, four hundred twenty million, forty thousand, four hundred eighteen".