20379666788 has 24 divisors (see below), whose sum is σ = 38415347712. Its totient is φ = 9404159904.

The previous prime is 20379666737. The next prime is 20379666809. The reversal of 20379666788 is 88766697302.

It is a self number, because there is not a number n which added to its sum of digits gives 20379666788.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 250781 + ... + 321947.

It is an arithmetic number, because the mean of its divisors is an integer number (1600639488).

Almost surely, 2^20379666788 is an apocalyptic number.

It is an amenable number.

20379666788 is a deficient number, since it is larger than the sum of its proper divisors (18035680924).

20379666788 is a wasteful number, since it uses less digits than its factorization.

20379666788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76691 (or 76689 counting only the distinct ones).

The product of its (nonzero) digits is 36578304, while the sum is 62.

The spelling of 20379666788 in words is "twenty billion, three hundred seventy-nine million, six hundred sixty-six thousand, seven hundred eighty-eight".