994531021442 has 24 divisors (see below), whose sum is σ = 1735486746300. Its totient is φ = 426195258720.

The previous prime is 994531021427. The next prime is 994531021459. The reversal of 994531021442 is 244120135499.

It can be written as a sum of positive squares in 2 ways, for example, as 897223833961 + 97307187481 = 947219^2 + 311941^2 .

It is a super-2 number, since 2×994531021442² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 994531021393 and 994531021402.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 937184 + ... + 1693332.

Almost surely, 2^994531021442 is an apocalyptic number.

994531021442 is a deficient number, since it is larger than the sum of its proper divisors (740955724858).

994531021442 is a wasteful number, since it uses less digits than its factorization.

994531021442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 769586 (or 769579 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 44.

The spelling of 994531021442 in words is "nine hundred ninety-four billion, five hundred thirty-one million, twenty-one thousand, four hundred forty-two".