20238039842 has 16 divisors (see below), whose sum is σ = 30689907360. Its totient is φ = 10008206208.

The previous prime is 20238039839. The next prime is 20238039869. The reversal of 20238039842 is 24893083202.

It is a self number, because there is not a number n which added to its sum of digits gives 20238039842.

It is an unprimeable number.

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, 273293 + ... + 339359.

It is an arithmetic number, because the mean of its divisors is an integer number (1918119210).

Almost surely, 2^20238039842 is an apocalyptic number.

20238039842 is a deficient number, since it is larger than the sum of its proper divisors (10451867518).

20238039842 is a wasteful number, since it uses less digits than its factorization.

20238039842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67745.

The product of its (nonzero) digits is 165888, while the sum is 41.

The spelling of 20238039842 in words is "twenty billion, two hundred thirty-eight million, thirty-nine thousand, eight hundred forty-two".