18409169852 has 24 divisors (see below), whose sum is σ = 32905244400. Its totient is φ = 9009035136.

The previous prime is 18409169839. The next prime is 18409169861. The reversal of 18409169852 is 25896190481.

It is a junction number, because it is equal to n+sod(n) for n = 18409169794 and 18409169803.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 116273 + ... + 224360.

It is an arithmetic number, because the mean of its divisors is an integer number (1371051850).

Almost surely, 2^18409169852 is an apocalyptic number.

It is an amenable number.

18409169852 is a deficient number, since it is larger than the sum of its proper divisors (14496074548).

18409169852 is a wasteful number, since it uses less digits than its factorization.

18409169852 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 340925 (or 340923 counting only the distinct ones).

The product of its (nonzero) digits is 1244160, while the sum is 53.

The spelling of 18409169852 in words is "eighteen billion, four hundred nine million, one hundred sixty-nine thousand, eight hundred fifty-two".