31023003012320 has 96 divisors (see below), whose sum is σ = 79981737413760. Its totient is φ = 11277282787840.

The previous prime is 31023003012307. The next prime is 31023003012347. The reversal of 31023003012320 is 2321030032013.

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 = 31023003012292 and 31023003012301.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2240411 + ... + 8189349.

It is an arithmetic number, because the mean of its divisors is an integer number (833143098060).

Almost surely, 2^{31023003012320} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31023003012320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39990868706880).

31023003012320 is an abundant number, since it is smaller than the sum of its proper divisors (48958734401440).

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

31023003012320 is a wasteful number, since it uses less digits than its factorization.

31023003012320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5951928 (or 5951920 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 20.

Adding to 31023003012320 its reverse (2321030032013), we get a palindrome (33344033044333).

The spelling of 31023003012320 in words is "thirty-one trillion, twenty-three billion, three million, twelve thousand, three hundred twenty".