42240242420 has 12 divisors (see below), whose sum is σ = 88704509124. Its totient is φ = 16896096960.

The previous prime is 42240242419. The next prime is 42240242441. The reversal of 42240242420 is 2424204224.

It can be written as a sum of positive squares in 2 ways, for example, as 28435402384 + 13804840036 = 168628^2 + 117494^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 42240242420.

It is a congruent number.

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, 1056006041 + ... + 1056006080.

It is an arithmetic number, because the mean of its divisors is an integer number (7392042427).

Almost surely, 2^42240242420 is an apocalyptic number.

It is an amenable number.

42240242420 is an abundant number, since it is smaller than the sum of its proper divisors (46464266704).

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

42240242420 is a wasteful number, since it uses less digits than its factorization.

42240242420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2112012130 (or 2112012128 counting only the distinct ones).

The product of its (nonzero) digits is 8192, while the sum is 26.

Adding to 42240242420 its reverse (2424204224), we get a palindrome (44664446644).

The spelling of 42240242420 in words is "forty-two billion, two hundred forty million, two hundred forty-two thousand, four hundred twenty".