20377643518 has 8 divisors (see below), whose sum is σ = 30567661200. Its totient is φ = 10188423120.

The previous prime is 20377643459. The next prime is 20377643549. The reversal of 20377643518 is 81534677302.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 130698 + ... + 240493.

It is an arithmetic number, because the mean of its divisors is an integer number (3820957650).

Almost surely, 2^20377643518 is an apocalyptic number.

20377643518 is a deficient number, since it is larger than the sum of its proper divisors (10190017682).

20377643518 is a wasteful number, since it uses less digits than its factorization.

20377643518 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 398642.

The product of its (nonzero) digits is 846720, while the sum is 46.

The spelling of 20377643518 in words is "twenty billion, three hundred seventy-seven million, six hundred forty-three thousand, five hundred eighteen".