18839420929 has 16 divisors (see below), whose sum is σ = 21866674048. Its totient is φ = 15896466432.

The previous prime is 18839420903. The next prime is 18839420953. The reversal of 18839420929 is 92902493881.

It is not a de Polignac number, because 18839420929 - 2¹¹ = 18839418881 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18839420929.

It is not an unprimeable number, because it can be changed into a prime (18839426929) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 736417 + ... + 761569.

It is an arithmetic number, because the mean of its divisors is an integer number (1366667128).

Almost surely, 2^18839420929 is an apocalyptic number.

It is an amenable number.

18839420929 is a deficient number, since it is larger than the sum of its proper divisors (3027253119).

18839420929 is a wasteful number, since it uses less digits than its factorization.

18839420929 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26824.

The product of its (nonzero) digits is 2239488, while the sum is 55.

The spelling of 18839420929 in words is "eighteen billion, eight hundred thirty-nine million, four hundred twenty thousand, nine hundred twenty-nine".