31020420000 has 240 divisors, whose sum is σ = 102995655840. Its totient is φ = 8171136000.

The previous prime is 31020419869. The next prime is 31020420019. The reversal of 31020420000 is 2402013.

It is a tau number, because it is divible by the number of its divisors (240).

It is a Harshad number since it is a multiple of its sum of digits (12).

It is an unprimeable number.

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 39 ways as a sum of consecutive naturals, for example, 4976886 + ... + 4983114.

It is an arithmetic number, because the mean of its divisors is an integer number (429148566).

Almost surely, 2^31020420000 is an apocalyptic number.

31020420000 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31020420000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (51497827920).

31020420000 is an abundant number, since it is smaller than the sum of its proper divisors (71975235840).

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

31020420000 is an equidigital number, since it uses as much as digits as its factorization.

31020420000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6345 (or 6322 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 12.

Adding to 31020420000 its reverse (2402013), we get a palindrome (31022822013).

The spelling of 31020420000 in words is "thirty-one billion, twenty million, four hundred twenty thousand".