18090423136 has 24 divisors (see below), whose sum is σ = 35649092304. Its totient is φ = 9036685440.

The previous prime is 18090423121. The next prime is 18090423161. The reversal of 18090423136 is 63132409081.

It is a junction number, because it is equal to n+sod(n) for n = 18090423095 and 18090423104.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 231895 + ... + 299926.

It is an arithmetic number, because the mean of its divisors is an integer number (1485378846).

Almost surely, 2^18090423136 is an apocalyptic number.

18090423136 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

18090423136 is a deficient number, since it is larger than the sum of its proper divisors (17558669168).

18090423136 is a wasteful number, since it uses less digits than its factorization.

18090423136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 532894 (or 532886 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 37.

The spelling of 18090423136 in words is "eighteen billion, ninety million, four hundred twenty-three thousand, one hundred thirty-six".