31321032013020 has 48 divisors (see below), whose sum is σ = 87699189826080. Its totient is φ = 8352246614016.

The previous prime is 31321032013003. The next prime is 31321032013021. The reversal of 31321032013020 is 2031023012313.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31321032013021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21363864 + ... + 22782816.

It is an arithmetic number, because the mean of its divisors is an integer number (1827066454710).

Almost surely, 2^{31321032013020} is an apocalyptic number.

31321032013020 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31321032013020 is an abundant number, since it is smaller than the sum of its proper divisors (56378157813060).

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

31321032013020 is a wasteful number, since it uses less digits than its factorization.

31321032013020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1786854 (or 1786852 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 31321032013020 its reverse (2031023012313), we get a palindrome (33352055025333).

The spelling of 31321032013020 in words is "thirty-one trillion, three hundred twenty-one billion, thirty-two million, thirteen thousand, twenty".