31042343420 has 24 divisors (see below), whose sum is σ = 71115187248. Its totient is φ = 11288124800.

The previous prime is 31042343411. The next prime is 31042343447. The reversal of 31042343420 is 2434324013.

It is a self number, because there is not a number n which added to its sum of digits gives 31042343420.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70550561 + ... + 70551000.

It is an arithmetic number, because the mean of its divisors is an integer number (2963132802).

Almost surely, 2^31042343420 is an apocalyptic number.

It is an amenable number.

31042343420 is an abundant number, since it is smaller than the sum of its proper divisors (40072843828).

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

31042343420 is a wasteful number, since it uses less digits than its factorization.

31042343420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141101581 (or 141101579 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 26.

Adding to 31042343420 its reverse (2434324013), we get a palindrome (33476667433).

The spelling of 31042343420 in words is "thirty-one billion, forty-two million, three hundred forty-three thousand, four hundred twenty".