1942242517840 has 20 divisors (see below), whose sum is σ = 4515713854164. Its totient is φ = 776897007104.

The previous prime is 1942242517801. The next prime is 1942242517843. The reversal of 1942242517840 is 487152422491.

It can be written as a sum of positive squares in 2 ways, for example, as 998904300304 + 943338217536 = 999452^2 + 971256^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1942242517843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12139015657 + ... + 12139015816.

Almost surely, 2^{1942242517840} is an apocalyptic number.

1942242517840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1942242517840 is an abundant number, since it is smaller than the sum of its proper divisors (2573471336324).

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

1942242517840 is a wasteful number, since it uses less digits than its factorization.

1942242517840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24278031486 (or 24278031480 counting only the distinct ones).

The product of its (nonzero) digits is 1290240, while the sum is 49.

The spelling of 1942242517840 in words is "one trillion, nine hundred forty-two billion, two hundred forty-two million, five hundred seventeen thousand, eight hundred forty".