31440011020 has 48 divisors (see below), whose sum is σ = 72042507936. Its totient is φ = 11430144000.

The previous prime is 31440010963. The next prime is 31440011051. The reversal of 31440011020 is 2011004413.

It is a junction number, because it is equal to n+sod(n) for n = 31440010985 and 31440011003.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1148290 + ... + 1175350.

It is an arithmetic number, because the mean of its divisors is an integer number (1500885582).

Almost surely, 2^31440011020 is an apocalyptic number.

It is an amenable number.

31440011020 is an abundant number, since it is smaller than the sum of its proper divisors (40602496916).

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

31440011020 is a wasteful number, since it uses less digits than its factorization.

31440011020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32362 (or 32360 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 31440011020 its reverse (2011004413), we get a palindrome (33451015433).

The spelling of 31440011020 in words is "thirty-one billion, four hundred forty million, eleven thousand, twenty".