20549377124639 has 8 divisors (see below), whose sum is σ = 22578779314560. Its totient is φ = 18546854434200.

The previous prime is 20549377124503. The next prime is 20549377124657. The reversal of 20549377124639 is 93642177394502.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20549377124639 - 2²⁰ = 20549376076063 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20549377124239) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6719873267 + ... + 6719876324.

It is an arithmetic number, because the mean of its divisors is an integer number (2822347414320).

Almost surely, 2^{20549377124639} is an apocalyptic number.

20549377124639 is a deficient number, since it is larger than the sum of its proper divisors (2029402189921).

20549377124639 is a wasteful number, since it uses less digits than its factorization.

20549377124639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13439749741.

The product of its (nonzero) digits is 68584320, while the sum is 62.

The spelling of 20549377124639 in words is "twenty trillion, five hundred forty-nine billion, three hundred seventy-seven million, one hundred twenty-four thousand, six hundred thirty-nine".