31442020 has 12 divisors (see below), whose sum is σ = 66028284. Its totient is φ = 12576800.

The previous prime is 31441999. The next prime is 31442069. The reversal of 31442020 is 2024413.

It can be written as a sum of positive squares in 2 ways, for example, as 22810176 + 8631844 = 4776^2 + 2938^2 .

It is a junction number, because it is equal to n+sod(n) for n = 31441985 and 31442003.

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, 786031 + ... + 786070.

It is an arithmetic number, because the mean of its divisors is an integer number (5502357).

Almost surely, 2^31442020 is an apocalyptic number.

It is an amenable number.

31442020 is an abundant number, since it is smaller than the sum of its proper divisors (34586264).

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

31442020 is a wasteful number, since it uses less digits than its factorization.

31442020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1572110 (or 1572108 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 31442020 is about 5607.3184321920. The cubic root of 31442020 is about 315.6240923413.

Adding to 31442020 its reverse (2024413), we get a palindrome (33466433).

The spelling of 31442020 in words is "thirty-one million, four hundred forty-two thousand, twenty".