21013440033042 has 48 divisors (see below), whose sum is σ = 48208384125720. Its totient is φ = 6592304011776.

The previous prime is 21013440033037. The next prime is 21013440033163. The reversal of 21013440033042 is 24033004431012.

21013440033042 is a `hidden beast` number, since 2 + 10 + 1 + 344 + 0 + 0 + 3 + 304 + 2 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 9988324105761 + 11025115927281 = 3160431^2 + 3320409^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21013440032997 and 21013440033015.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13326028 + ... + 14819240.

Almost surely, 2^{21013440033042} is an apocalyptic number.

21013440033042 is an abundant number, since it is smaller than the sum of its proper divisors (27194944092678).

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

21013440033042 is a wasteful number, since it uses less digits than its factorization.

21013440033042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1539227 (or 1539224 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 27.

Adding to 21013440033042 its reverse (24033004431012), we get a palindrome (45046444464054).

The spelling of 21013440033042 in words is "twenty-one trillion, thirteen billion, four hundred forty million, thirty-three thousand, forty-two".