20377559838 has 16 divisors (see below), whose sum is σ = 41423237136. Its totient is φ = 6681167040.

The previous prime is 20377559837. The next prime is 20377559893. The reversal of 20377559838 is 83895577302.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20377559837) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27837831 + ... + 27838562.

It is an arithmetic number, because the mean of its divisors is an integer number (2588952321).

Almost surely, 2^20377559838 is an apocalyptic number.

20377559838 is an abundant number, since it is smaller than the sum of its proper divisors (21045677298).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20377559838 is a wasteful number, since it uses less digits than its factorization.

20377559838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55676459.

The product of its (nonzero) digits is 12700800, while the sum is 57.

The spelling of 20377559838 in words is "twenty billion, three hundred seventy-seven million, five hundred fifty-nine thousand, eight hundred thirty-eight".