20004356356542 has 48 divisors (see below), whose sum is σ = 43395812879328. Its totient is φ = 6659960017920.

The previous prime is 20004356356507. The next prime is 20004356356553. The reversal of 20004356356542 is 24565365340002.

20004356356542 is a `hidden beast` number, since 2 + 0 + 0 + 0 + 4 + 3 + 5 + 635 + 6 + 5 + 4 + 2 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 202028998 + ... + 202127990.

It is an arithmetic number, because the mean of its divisors is an integer number (904079434986).

Almost surely, 2^{20004356356542} is an apocalyptic number.

20004356356542 is an abundant number, since it is smaller than the sum of its proper divisors (23391456522786).

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

20004356356542 is a wasteful number, since it uses less digits than its factorization.

20004356356542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112625 (or 112622 counting only the distinct ones).

The product of its (nonzero) digits is 2592000, while the sum is 45.

The spelling of 20004356356542 in words is "twenty trillion, four billion, three hundred fifty-six million, three hundred fifty-six thousand, five hundred forty-two".