31441400020 has 48 divisors (see below), whose sum is σ = 67582988928. Its totient is φ = 12283483520.

The previous prime is 31441399967. The next prime is 31441400021. The reversal of 31441400020 is 2000414413.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31441400021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48474 + ... + 255406.

It is an arithmetic number, because the mean of its divisors is an integer number (1407978936).

Almost surely, 2^31441400020 is an apocalyptic number.

It is an amenable number.

31441400020 is an abundant number, since it is smaller than the sum of its proper divisors (36141588908).

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

31441400020 is a wasteful number, since it uses less digits than its factorization.

31441400020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207120 (or 207118 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 31441400020 its reverse (2000414413), we get a palindrome (33441814433).

The spelling of 31441400020 in words is "thirty-one billion, four hundred forty-one million, four hundred thousand, twenty".