31050020 has 12 divisors (see below), whose sum is σ = 65205084. Its totient is φ = 12420000.

The previous prime is 31050001. The next prime is 31050083. The reversal of 31050020 is 2005013.

It can be written as a sum of positive squares in 2 ways, for example, as 20448484 + 10601536 = 4522^2 + 3256^2 .

It is a junction number, because it is equal to n+sod(n) for n = 31049983 and 31050010.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 776231 + ... + 776270.

It is an arithmetic number, because the mean of its divisors is an integer number (5433757).

Almost surely, 2^31050020 is an apocalyptic number.

It is an amenable number.

31050020 is an abundant number, since it is smaller than the sum of its proper divisors (34155064).

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

31050020 is a wasteful number, since it uses less digits than its factorization.

31050020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1552510 (or 1552508 counting only the distinct ones).

The product of its (nonzero) digits is 30, while the sum is 11.

The square root of 31050020 is about 5572.2544809081. The cubic root of 31050020 is about 314.3069334355.

Adding to 31050020 its reverse (2005013), we get a palindrome (33055033).

The spelling of 31050020 in words is "thirty-one million, fifty thousand, twenty".