31332020 has 24 divisors (see below), whose sum is σ = 69668424. Its totient is φ = 11795456.

The previous prime is 31332011. The next prime is 31332029. The reversal of 31332020 is 2023313.

It is an interprime number because it is at equal distance from previous prime (31332011) and next prime (31332029).

It can be written as a sum of positive squares in 4 ways, for example, as 9560464 + 21771556 = 3092^2 + 4666^2 .

It is a junction number, because it is equal to n+sod(n) for n = 31331986 and 31332004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31332029) 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, 45737 + ... + 46416.

It is an arithmetic number, because the mean of its divisors is an integer number (2902851).

Almost surely, 2^31332020 is an apocalyptic number.

It is an amenable number.

31332020 is an abundant number, since it is smaller than the sum of its proper divisors (38336404).

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

31332020 is a wasteful number, since it uses less digits than its factorization.

31332020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92179 (or 92177 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 14.

The square root of 31332020 is about 5597.5012282268. The cubic root of 31332020 is about 315.2555916661.

Adding to 31332020 its reverse (2023313), we get a palindrome (33355333).

The spelling of 31332020 in words is "thirty-one million, three hundred thirty-two thousand, twenty".