31302212020 has 24 divisors (see below), whose sum is σ = 68592674304. Its totient is φ = 11976498336.

The previous prime is 31302212003. The next prime is 31302212021. The reversal of 31302212020 is 2021220313.

It is a junction number, because it is equal to n+sod(n) for n = 31302211985 and 31302212003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31302212021) 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, 34023684 + ... + 34024603.

It is an arithmetic number, because the mean of its divisors is an integer number (2858028096).

Almost surely, 2^31302212020 is an apocalyptic number.

It is an amenable number.

31302212020 is an abundant number, since it is smaller than the sum of its proper divisors (37290462284).

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

31302212020 is a wasteful number, since it uses less digits than its factorization.

31302212020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68048319 (or 68048317 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 31302212020 its reverse (2021220313), we get a palindrome (33323432333).

The spelling of 31302212020 in words is "thirty-one billion, three hundred two million, two hundred twelve thousand, twenty".