20889013763761 has 16 divisors (see below), whose sum is σ = 24634250847360. Its totient is φ = 17462591176320.

The previous prime is 20889013763743. The next prime is 20889013763843. The reversal of 20889013763761 is 16736731098802.

It is a cyclic number.

It is not a de Polignac number, because 20889013763761 - 2¹⁷ = 20889013632689 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20889013763761.

It is not an unprimeable number, because it can be changed into a prime (20889013763861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 277675356 + ... + 277750573.

It is an arithmetic number, because the mean of its divisors is an integer number (1539640677960).

Almost surely, 2^{20889013763761} is an apocalyptic number.

It is an amenable number.

20889013763761 is a deficient number, since it is larger than the sum of its proper divisors (3745237083599).

20889013763761 is a wasteful number, since it uses less digits than its factorization.

20889013763761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 555426216.

The product of its (nonzero) digits is 18289152, while the sum is 61.

The spelling of 20889013763761 in words is "twenty trillion, eight hundred eighty-nine billion, thirteen million, seven hundred sixty-three thousand, seven hundred sixty-one".