18898528909 has 8 divisors (see below), whose sum is σ = 20375857152. Its totient is φ = 17424571440.

The previous prime is 18898528903. The next prime is 18898528951. The reversal of 18898528909 is 90982589881.

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

It is a cyclic number.

It is not a de Polignac number, because 18898528909 - 2²³ = 18890140301 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18898528903) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 831037 + ... + 853474.

It is an arithmetic number, because the mean of its divisors is an integer number (2546982144).

Almost surely, 2^18898528909 is an apocalyptic number.

It is an amenable number.

18898528909 is a deficient number, since it is larger than the sum of its proper divisors (1477328243).

18898528909 is a wasteful number, since it uses less digits than its factorization.

18898528909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1685387.

The product of its (nonzero) digits is 29859840, while the sum is 67.

The spelling of 18898528909 in words is "eighteen billion, eight hundred ninety-eight million, five hundred twenty-eight thousand, nine hundred nine".