31100313020 has 192 divisors, whose sum is σ = 80946432000. Its totient is φ = 9799004160.

The previous prime is 31100313007. The next prime is 31100313047. The reversal of 31100313020 is 2031300113.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a junction number, because it is equal to n+sod(n) for n = 31100312986 and 31100313004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 21702224 + ... + 21703656.

It is an arithmetic number, because the mean of its divisors is an integer number (421596000).

Almost surely, 2^31100313020 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 31100313020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40473216000).

31100313020 is an abundant number, since it is smaller than the sum of its proper divisors (49846118980).

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

31100313020 is a wasteful number, since it uses less digits than its factorization.

31100313020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1708 (or 1706 counting only the distinct ones).

The product of its (nonzero) digits is 54, while the sum is 14.

Adding to 31100313020 its reverse (2031300113), we get a palindrome (33131613133).

The spelling of 31100313020 in words is "thirty-one billion, one hundred million, three hundred thirteen thousand, twenty".