18858901489 has 4 divisors (see below), whose sum is σ = 18859185124. Its totient is φ = 18858617856.

The previous prime is 18858901471. The next prime is 18858901519. The reversal of 18858901489 is 98410985881.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 12303246400 + 6555655089 = 110920^2 + 80967^2 .

It is a cyclic number.

It is not a de Polignac number, because 18858901489 - 2³¹ = 16711417841 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18858901469) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17809 + ... + 195025.

It is an arithmetic number, because the mean of its divisors is an integer number (4714796281).

Almost surely, 2^18858901489 is an apocalyptic number.

It is an amenable number.

18858901489 is a deficient number, since it is larger than the sum of its proper divisors (283635).

18858901489 is a wasteful number, since it uses less digits than its factorization.

18858901489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 283634.

The product of its (nonzero) digits is 6635520, while the sum is 61.

The spelling of 18858901489 in words is "eighteen billion, eight hundred fifty-eight million, nine hundred one thousand, four hundred eighty-nine".