20042042402256 has 40 divisors (see below), whose sum is σ = 59171744236224. Its totient is φ = 5726297829120.

The previous prime is 20042042402227. The next prime is 20042042402273. The reversal of 20042042402256 is 65220424024002.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29824467525 + ... + 29824468196.

Almost surely, 2^{20042042402256} is an apocalyptic number.

It is an amenable number.

20042042402256 is an abundant number, since it is smaller than the sum of its proper divisors (39129701833968).

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

20042042402256 is a wasteful number, since it uses less digits than its factorization.

20042042402256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59648935739 (or 59648935733 counting only the distinct ones).

The product of its (nonzero) digits is 61440, while the sum is 33.

Adding to 20042042402256 its reverse (65220424024002), we get a palindrome (85262466426258).

The spelling of 20042042402256 in words is "twenty trillion, forty-two billion, forty-two million, four hundred two thousand, two hundred fifty-six".