31440202110020 has 24 divisors (see below), whose sum is σ = 72026644834368. Its totient is φ = 11432800767200.

The previous prime is 31440202109977. The next prime is 31440202110029. The reversal of 31440202110020 is 2001120204413.

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 = 31440202109974 and 31440202110001.

It is not an unprimeable number, because it can be changed into a prime (31440202110029) 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 7 ways as a sum of consecutive naturals, for example, 71455004576 + ... + 71455005015.

It is an arithmetic number, because the mean of its divisors is an integer number (3001110201432).

Almost surely, 2^{31440202110020} is an apocalyptic number.

It is an amenable number.

31440202110020 is an abundant number, since it is smaller than the sum of its proper divisors (40586442724348).

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

31440202110020 is a wasteful number, since it uses less digits than its factorization.

31440202110020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142910009611 (or 142910009609 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 31440202110020 its reverse (2001120204413), we get a palindrome (33441322314433).

The spelling of 31440202110020 in words is "thirty-one trillion, four hundred forty billion, two hundred two million, one hundred ten thousand, twenty".