40131234020 has 24 divisors (see below), whose sum is σ = 84409176768. Its totient is φ = 16027048800.

The previous prime is 40131233981. The next prime is 40131234029. The reversal of 40131234020 is 2043213104.

It is a super-2 number, since 2×40131234020² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 40131233983 and 40131234001.

It is not an unprimeable number, because it can be changed into a prime (40131234029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1577366 + ... + 1602605.

It is an arithmetic number, because the mean of its divisors is an integer number (3517049032).

Almost surely, 2^40131234020 is an apocalyptic number.

It is an amenable number.

40131234020 is an abundant number, since it is smaller than the sum of its proper divisors (44277942748).

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

40131234020 is a wasteful number, since it uses less digits than its factorization.

40131234020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3180611 (or 3180609 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 40131234020 its reverse (2043213104), we get a palindrome (42174447124).

The spelling of 40131234020 in words is "forty billion, one hundred thirty-one million, two hundred thirty-four thousand, twenty".