20671769379 has 16 divisors (see below), whose sum is σ = 27950209664. Its totient is φ = 13587393600.

The previous prime is 20671769311. The next prime is 20671769383. The reversal of 20671769379 is 97396717602.

It is not a de Polignac number, because 20671769379 - 2²⁷ = 20537551651 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20671769399) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 634764 + ... + 666534.

It is an arithmetic number, because the mean of its divisors is an integer number (1746888104).

Almost surely, 2^20671769379 is an apocalyptic number.

20671769379 is a deficient number, since it is larger than the sum of its proper divisors (7278440285).

20671769379 is a wasteful number, since it uses less digits than its factorization.

20671769379 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34818.

The product of its (nonzero) digits is 6001128, while the sum is 57.

The spelling of 20671769379 in words is "twenty billion, six hundred seventy-one million, seven hundred sixty-nine thousand, three hundred seventy-nine".