20766544771 has 8 divisors (see below), whose sum is σ = 24498781184. Its totient is φ = 17225705160.

The previous prime is 20766544753. The next prime is 20766544783. The reversal of 20766544771 is 17744566702.

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 20766544771 - 2¹³ = 20766536579 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20766545771) 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, 47848965 + ... + 47849398.

It is an arithmetic number, because the mean of its divisors is an integer number (3062347648).

Almost surely, 2^20766544771 is an apocalyptic number.

20766544771 is a deficient number, since it is larger than the sum of its proper divisors (3732236413).

20766544771 is an equidigital number, since it uses as much as digits as its factorization.

20766544771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95698401.

The product of its (nonzero) digits is 1975680, while the sum is 49.

The spelling of 20766544771 in words is "twenty billion, seven hundred sixty-six million, five hundred forty-four thousand, seven hundred seventy-one".