42051331720 has 64 divisors (see below), whose sum is σ = 95962608000. Its totient is φ = 16581293568.

The previous prime is 42051331711. The next prime is 42051331741. The reversal of 42051331720 is 2713315024.

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, 9689311 + ... + 9693649.

It is an arithmetic number, because the mean of its divisors is an integer number (1499415750).

Almost surely, 2^42051331720 is an apocalyptic number.

42051331720 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42051331720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47981304000).

42051331720 is an abundant number, since it is smaller than the sum of its proper divisors (53911276280).

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

42051331720 is a wasteful number, since it uses less digits than its factorization.

42051331720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7742 (or 7738 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 28.

Adding to 42051331720 its reverse (2713315024), we get a palindrome (44764646744).

The spelling of 42051331720 in words is "forty-two billion, fifty-one million, three hundred thirty-one thousand, seven hundred twenty".