31020303312020 has 24 divisors (see below), whose sum is σ = 71064694860768. Its totient is φ = 11280110295200.

The previous prime is 31020303311947. The next prime is 31020303312023. The reversal of 31020303312020 is 2021330302013.

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 = 31020303311983 and 31020303312001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31020303312023) 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, 70500689126 + ... + 70500689565.

It is an arithmetic number, because the mean of its divisors is an integer number (2961028952532).

Almost surely, 2^{31020303312020} is an apocalyptic number.

It is an amenable number.

31020303312020 is an abundant number, since it is smaller than the sum of its proper divisors (40044391548748).

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

31020303312020 is a wasteful number, since it uses less digits than its factorization.

31020303312020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141001378711 (or 141001378709 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 20.

Adding to 31020303312020 its reverse (2021330302013), we get a palindrome (33041633614033).

The spelling of 31020303312020 in words is "thirty-one trillion, twenty billion, three hundred three million, three hundred twelve thousand, twenty".