21042033342 has 48 divisors (see below), whose sum is σ = 46815148800. Its totient is φ = 6299531920.

The previous prime is 21042033329. The next prime is 21042033371. The reversal of 21042033342 is 24333024012.

It is a congruent number.

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, 114342 + ... + 234857.

It is an arithmetic number, because the mean of its divisors is an integer number (975315600).

Almost surely, 2^21042033342 is an apocalyptic number.

21042033342 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21042033342 is an abundant number, since it is smaller than the sum of its proper divisors (25773115458).

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

21042033342 is a wasteful number, since it uses less digits than its factorization.

21042033342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 349309 (or 349298 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 24.

Adding to 21042033342 its reverse (24333024012), we get a palindrome (45375057354).

The spelling of 21042033342 in words is "twenty-one billion, forty-two million, thirty-three thousand, three hundred forty-two".