31042023320 has 192 divisors, whose sum is σ = 90798291360. Its totient is φ = 9439180800.

The previous prime is 31042023289. The next prime is 31042023367. The reversal of 31042023320 is 2332024013.

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 = 31042023292 and 31042023301.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 866402 + ... + 901518.

Almost surely, 2^31042023320 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 31042023320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45399145680).

31042023320 is an abundant number, since it is smaller than the sum of its proper divisors (59756268040).

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

31042023320 is a wasteful number, since it uses less digits than its factorization.

31042023320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35194 (or 35183 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 20.

Adding to 31042023320 its reverse (2332024013), we get a palindrome (33374047333).

The spelling of 31042023320 in words is "thirty-one billion, forty-two million, twenty-three thousand, three hundred twenty".