20504377838542 has 12 divisors (see below), whose sum is σ = 33304448028240. Its totient is φ = 9463559002248.

The previous prime is 20504377838537. The next prime is 20504377838579. The reversal of 20504377838542 is 24583877340502.

It is a congruent number.

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 5 ways as a sum of consecutive naturals, for example, 30331919542 + ... + 30331920217.

It is an arithmetic number, because the mean of its divisors is an integer number (2775370669020).

Almost surely, 2^{20504377838542} is an apocalyptic number.

20504377838542 is a deficient number, since it is larger than the sum of its proper divisors (12800070189698).

20504377838542 is a wasteful number, since it uses less digits than its factorization.

20504377838542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60663839787 (or 60663839774 counting only the distinct ones).

The product of its (nonzero) digits is 45158400, while the sum is 58.

The spelling of 20504377838542 in words is "twenty trillion, five hundred four billion, three hundred seventy-seven million, eight hundred thirty-eight thousand, five hundred forty-two".