40032420443020 has 24 divisors (see below), whose sum is σ = 84099001795200. Its totient is φ = 16007078869632.

The previous prime is 40032420443017. The next prime is 40032420443021. The reversal of 40032420443020 is 2034402423004.

It is a happy number.

It is a super-2 number, since 2×40032420443020² (a number of 28 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 40032420443020.

It is not an unprimeable number, because it can be changed into a prime (40032420443021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 368025985 + ... + 368134744.

It is an arithmetic number, because the mean of its divisors is an integer number (3504125074800).

Almost surely, 2^{40032420443020} is an apocalyptic number.

It is an amenable number.

40032420443020 is an abundant number, since it is smaller than the sum of its proper divisors (44066581352180).

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

40032420443020 is a wasteful number, since it uses less digits than its factorization.

40032420443020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 736163457 (or 736163455 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 28.

Adding to 40032420443020 its reverse (2034402423004), we get a palindrome (42066822866024).

The spelling of 40032420443020 in words is "forty trillion, thirty-two billion, four hundred twenty million, four hundred forty-three thousand, twenty".