20031031212 has 24 divisors (see below), whose sum is σ = 46756414656. Its totient is φ = 6674533008.

The previous prime is 20031031187. The next prime is 20031031231. The reversal of 20031031212 is 21213013002.

It is a super-2 number, since 2×20031031212² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20031031191 and 20031031200.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 275838 + ... + 340805.

It is an arithmetic number, because the mean of its divisors is an integer number (1948183944).

Almost surely, 2^20031031212 is an apocalyptic number.

It is an amenable number.

20031031212 is an abundant number, since it is smaller than the sum of its proper divisors (26725383444).

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

20031031212 is a wasteful number, since it uses less digits than its factorization.

20031031212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 619357 (or 619355 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 20031031212 its reverse (21213013002), we get a palindrome (41244044214).

The spelling of 20031031212 in words is "twenty billion, thirty-one million, thirty-one thousand, two hundred twelve".