31113020032 has 64 divisors (see below), whose sum is σ = 62675360640. Its totient is φ = 15383623680.

The previous prime is 31113020009. The next prime is 31113020039. The reversal of 31113020032 is 23002031113.

It is a tau number, because it is divible by the number of its divisors (64).

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a junction number, because it is equal to n+sod(n) for n = 31113019988 and 31113020015.

It is not an unprimeable number, because it can be changed into a prime (31113020039) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4748983 + ... + 4755529.

It is an arithmetic number, because the mean of its divisors is an integer number (979302510).

Almost surely, 2^31113020032 is an apocalyptic number.

31113020032 is a gapful number since it is divisible by the number (32) 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 31113020032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31337680320).

31113020032 is an abundant number, since it is smaller than the sum of its proper divisors (31562340608).

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

31113020032 is a wasteful number, since it uses less digits than its factorization.

31113020032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6969 (or 6957 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 16.

Adding to 31113020032 its reverse (23002031113), we get a palindrome (54115051145).

The spelling of 31113020032 in words is "thirty-one billion, one hundred thirteen million, twenty thousand, thirty-two".